I thought they (whoever made this movie) made a concerted effort to make the transformers more recognizable. Before, you couldn't tell one transformer to the next or what part was their face, etc. Now, at least, you can kind of tell who's who (though, in my opinion, they still all kind of look the same).
I'm not usually one to critique films. I can easily suspend my disbelief. I don't consider myself a movie snob or anything along those lines. However, this movie had all kinds of moments where I was just like, "Huh? This makes no sense" or "This is just dumb." For instance, what's the point of the big magnet near the end that just picks all metal up for a few seconds and then drops it? What use would that be - to almost pick something up? "Hey look at this almost magnet. Yeah it almost picks metal shit up for you. Rather than pick it up all the way, it just halfway picks it up and then drops it on the ground, kind of fucking everything up in the process. Completely useless, but I got one strapped to my spaceship anyway. So, yeah."