Which one is Brawl and which one is Bonecrusher?
Bonecrusher is a tan/beige tow truck dealie.
http://www.solidsmack.com/wp-content/uploads/2007/08/buffalo-03.jpg
He looks like this when he transforms.
http://www.vh1.com/shared/promoimages/movies/t/transformers/bonecrusher/281x211.jpg
Here's Brawl:
http://fc00.deviantart.com/fs21/f/2007/239/f/e/Brawl___Transformers_by_Rhanubis.jpg
See how one's beige, and one is green? How one is a little more elongated, and has wheels for feet, and the other...
The point is, it's possible to tell these things apart. You might not be able to tell which one is named what without knowing their name beforehand and remembering that somehow, but again, the same could be said of the dozens and dozens of Transformers in the comics and the cartoon.
The whole "human reaction" thing could be covered in the 25 minutes. You can't really stretch it out 2 entire movies.
The fact remains...it's already been one whole movie (two now). Hence, all the important themes of Transformers haven't gotten their facetime, and were never going to. Granted, I don't think Bay was ever planning on delving into many of the aspects of Transformers that feature non human elements, but the point stands, it wouldn't have been terribly possible or realistic to believe such a film was going to have existed, given this approach.
what conveys their human-like aspirations and struggles is their Transformer to Transformer interactions. Something that has lacked terribly so far in the movies.
Short of "basic character interaction", can you elaborate?
Few if any elements have been explored. In between human shenanigans the movie relegates into a big, dumb, loud chase movie.
Themes about sacrifice, hidden potential, leadership, teamwork, cooperation, compromise, legacies, responsibility and loyalty have been touched on and explored. The anti imperialism angle is there, to a point. They've also delved into the very nature of the transformations, and a number of other things. So yeah...I wouldn't call that "few" elements of Transformers lore, nor would I say these are unimportant elements, either.
not sure what you're referring to here.
I'm not sure what you were referring to. I'm sure it'll come up again if it's important.