Yeah, the FOC version has its positive aspects... good size, holds together well, nice head sculpt... but its flaws really detract. Odd proportions are at the top of the list. Arms look really long and awkward and one is longer than the other. Individual bots are the wrong sizes, with Swindle being much taller than Onslaught... and many of them feeling hollow. Weapon is really awkward.
The old Energon version is clearly a low-budget combiner solution, with just 3 molds, but its proportions and playability are there. With the add-ons addressing the unsightly Jolly Rancher hands and adding the missing molds, it's a real contender for the better toy. I can't recommend those add ons more. Those are fantastic. (Foot swivel for the win.)
BUT, I do really like getting Cybertronian molds finally, and some game accurate toys for a change. Brawl is actually a favorite... all parts utilized, no "shell", good proportions, nice color accents...looks good in both forms and actually resembles a hover tank nicely... . (Whereas Swindle resembles a futuristic penny-loafer). Onslaught is a good toy, but relies on his weapon too much in his alt mode. Individually, flyers are pretty good, but their colors are awful like oatmeal. Plus they all feel a little cheap. I've never felt that before about actual Hasbro toys. Plastic feels like a KO at times. (Jazz was worst.)
Here's hoping Grimlock, Starscream, Sideswipe... all raise the bar a bit from here. As is, I'm starting to get nostalgic for the good ole days... when I had to walk to school, plastic was sturdy, and deluxes were a head taller.