Concepts rarely/never utilized in the series

Yesterday I was thinking of some of the modes/combinations/features that some Transformer figures have, and noticed that there are more than a few that never made it into animation! Here's a starting list, and please correct me if I am mistaken, because I did not research this in depth. Also, one or two appearances I'm counting as rarely used:
Of trailers, bases, and base modes
Sometimes base modes of Transformers were rare to see.
-The center bot of Scramble Combiners were never seen in their base mode in G1, even though it was official, and in the instructions. The only exception is Scattershot and his cannon mode, which is seen several times.
-The Scramble Combiners never combine with Metroplex. It is possible for the limbs to attach to Metroplex's arms/legs, and for all the parts to integrate with the base mode(even the Decepticons!).
-God Ginrai and Overlord both had a base mode. However, each were only seen on one, maybe two occasions, so if you didn't have the figure, it was easy to forget they had that ability!
-Star Saber's(G1) base mode was never seen.
-Scorponk's Fast Track, Fort Max's Cog, and Trypticon's Full-tilt/Brunt mini-figures/buddies were never seen in the animation. Fast Track did appear in Masterforce, but it was the Black Zarak one. Metroplex's Sixgun appeared twice, but got very little screen time.
-Ratchet/Ironhide's little gun platform/medical table is only seen a couple times.
-Despite being in nearly every episode, Prime's trailer rarely opens up, and Roller is only seen a couple times.
-Rodimus Prime's trailer is never seen opening up and revealing the dual laser cannons inside.
Weapons?
Sometimes Transformers didn't pull out some of their extra weapons
-Hot Rod is never seen with his double pistols. He always uses his exhaust lasers.
-Armada Optimus Prime doesn't use his smokestack gun(it does look a bit puny though).
-Cheetor's other gun is only seen a couple times.
-Menasaur is only seen brandishing his sword once.
-Devastator never has his head cannon.
-With the exception of Grimlock and Snarl, the Dinobots don't use thier swords. Also, Snarl is never seen with his rifle, and the Dinobots rarely, if ever, use their missle launchers.
-Prowl and Jazz aren't seen with their missle launchers.
-Hoist and Trailbreaker are never seen with their "missle hand", and always uses the laser cannon hand.
-Optimus Primal never uses his War Flail.
-Rhinox never uses his sword.
-Beast Wars Megatron never uses his hip guns.
-G1 Megatron never uses his gun attachements to form a tri-pod cannon.
It's called "Transformers"
Oddly enough, some Transformers never transformed!
-The Seacons never appeared in their robot modes in Masterforce. Similarly, neither did the Firecons.
-The Dinoforce(Victory) never transformed into beast mode.
-To my knowlegde, Insecticon and Cruelock(Energon) never transform into robot mode.
-Overload(Armada) never transforms, nor does his mini-con Rollout ever appear!
-Perceptor never transforms into his tank mode.
-Galvatron is only seen in his pistol mode during Marvel UK's "Target: 2006". He is never seen in this mode during the animated series.
Gimmicks left to the imagination
Sometimes they didn't use this gimmick for one reason or another.
-The Brainmaster gimmick is never shown outside of the stock footage transformation.
-The Multiforce(Victory) could swap positions, with one body forming the torso, and the other the legs. Well, with the exception of one episode(Mack and Tack switched), and maybe Wing Waver, they always have a standard combination. Wing Waver was also the only ones to appear in robot mode outside of the combination.
-Ultra Magnus never transforms into his robot cab mode.
-The Mutant Head concept in Beast Wars is never mentioned. Only Waspinator and Tarantulas use thier Mutant heads as seen on the figures, but can't switch to thier "normal" head.
-Armada Wheeljack never uses his "Mini-con Powerlink" mode.
Well, that's just a short list of my observations. Please feel free to add more items, categories, and inform me if I'm mistaken about any of these claims.
Of trailers, bases, and base modes
Sometimes base modes of Transformers were rare to see.
-The center bot of Scramble Combiners were never seen in their base mode in G1, even though it was official, and in the instructions. The only exception is Scattershot and his cannon mode, which is seen several times.
-The Scramble Combiners never combine with Metroplex. It is possible for the limbs to attach to Metroplex's arms/legs, and for all the parts to integrate with the base mode(even the Decepticons!).
-God Ginrai and Overlord both had a base mode. However, each were only seen on one, maybe two occasions, so if you didn't have the figure, it was easy to forget they had that ability!
-Star Saber's(G1) base mode was never seen.
-Scorponk's Fast Track, Fort Max's Cog, and Trypticon's Full-tilt/Brunt mini-figures/buddies were never seen in the animation. Fast Track did appear in Masterforce, but it was the Black Zarak one. Metroplex's Sixgun appeared twice, but got very little screen time.
-Ratchet/Ironhide's little gun platform/medical table is only seen a couple times.
-Despite being in nearly every episode, Prime's trailer rarely opens up, and Roller is only seen a couple times.
-Rodimus Prime's trailer is never seen opening up and revealing the dual laser cannons inside.
Weapons?
Sometimes Transformers didn't pull out some of their extra weapons
-Hot Rod is never seen with his double pistols. He always uses his exhaust lasers.
-Armada Optimus Prime doesn't use his smokestack gun(it does look a bit puny though).
-Cheetor's other gun is only seen a couple times.
-Menasaur is only seen brandishing his sword once.
-Devastator never has his head cannon.
-With the exception of Grimlock and Snarl, the Dinobots don't use thier swords. Also, Snarl is never seen with his rifle, and the Dinobots rarely, if ever, use their missle launchers.
-Prowl and Jazz aren't seen with their missle launchers.
-Hoist and Trailbreaker are never seen with their "missle hand", and always uses the laser cannon hand.
-Optimus Primal never uses his War Flail.
-Rhinox never uses his sword.
-Beast Wars Megatron never uses his hip guns.
-G1 Megatron never uses his gun attachements to form a tri-pod cannon.
It's called "Transformers"
Oddly enough, some Transformers never transformed!
-The Seacons never appeared in their robot modes in Masterforce. Similarly, neither did the Firecons.
-The Dinoforce(Victory) never transformed into beast mode.
-To my knowlegde, Insecticon and Cruelock(Energon) never transform into robot mode.
-Overload(Armada) never transforms, nor does his mini-con Rollout ever appear!
-Perceptor never transforms into his tank mode.
-Galvatron is only seen in his pistol mode during Marvel UK's "Target: 2006". He is never seen in this mode during the animated series.
Gimmicks left to the imagination
Sometimes they didn't use this gimmick for one reason or another.
-The Brainmaster gimmick is never shown outside of the stock footage transformation.
-The Multiforce(Victory) could swap positions, with one body forming the torso, and the other the legs. Well, with the exception of one episode(Mack and Tack switched), and maybe Wing Waver, they always have a standard combination. Wing Waver was also the only ones to appear in robot mode outside of the combination.
-Ultra Magnus never transforms into his robot cab mode.
-The Mutant Head concept in Beast Wars is never mentioned. Only Waspinator and Tarantulas use thier Mutant heads as seen on the figures, but can't switch to thier "normal" head.
-Armada Wheeljack never uses his "Mini-con Powerlink" mode.
Well, that's just a short list of my observations. Please feel free to add more items, categories, and inform me if I'm mistaken about any of these claims.