I finally have time to read and reply to this....
Glad you didn't hate it. It's definitely not as bad as the 59% it's getting on rottentomatoes right now
I thought the scene with Scoponok was pretty good.
The Autobots acted a little stupid and impatient at Sam's house not giving him much respect to him for trying to hide them from his parents. I thought Frenzy was cool because of the fact that he actually killed bitches! Yes he had the comedic antics of Jar Jar but he was still a killer. The scene at the airport after he got off Air Force One where he was walking and held his hand to his face like he was trying to hide was gold.
Bonecrusher isn't that major of a character or Decepticon anyway so why not let the audience see Prime's skills and kill him off quickly. No big deal. Starscream should have been given more lines as should the rest of the Decepticons. At least we did hear Megatron talk about him failing him once again which, for us long time fans, made perfect sense. This was basically an origin movie so it had to appeal to everyone hence why it was more human driven with lines and acting.
You didn't like the "one must stand" line? I thought it was great to add that in for fans of the original cartoon movie. My theater clapped when he said that. The final fight scenes should have been longer and filmed better but again, this is an origin movie. You had to have intros to these characters, a build up and a somewhat swift resolution. The original cartoon movie jumped right into the action and got away with that because back then everyone already knew about the Transformers and all the characters.
I'd go with a A-