My "unacceptable changes":
-Things like Optimus & Bumblebee, though different, are fine. Everyone else... how HARD would it've been to retain their initial colors? It's not rocket science. It's only as complex as being able to pick crayons out of a box.
-Starscream looks like pure ass.
-Starscream, judging by the script, has NO character resemblance to the original Starscream.
-Frenzy is just garbage on every level AND no resemblance to the G1 character.
-NO SOUNDWAVE, even though he was the OTHER guy in the Decepticon triangle of G1. (Megs, Starscream, Soundwave).
-The goofy "comedy" wasn't all over the place in each G1 episode. It didn't work in Godzilla's script, and it won't work here. Sad that an AFTER-SCHOOL CARTOON is overall "more serious" than a $150,000,000 live action movie.
-The cartoon was cool because the main characters the viewer had to connect with WEREN'T humans. This movie is the opposite and proud of it.
-This movie not only doesn't start off on Cybertron, but Cybertron is supposedly GONE. >__<
-MOST of the guys don't look like their old selves, even remotely.
-Most of the guys don't have the same roles they did before.
The makers of this movie were NOT fans of Transformers, and it's been insulting to me that it was initially stated they were as such.
Luckily though, through more interviews and such, their own words betray them.
And really, look how LITTLE the list above there is.
Why, ...why it's MINISCULE!
And yet, all those slap-in-the-face-obvious points were SOMEHOW missed.