All I care about is giant robots beating the holy heck out of each other. I'm not going to waste time judging any other content if Bay delivers on that, like he's already done three times. (some of you really need to remove the damn stick...)
That's sort of the point, the previous movie focused more on Shia LeBouf and his "antics" more than it the the transformer characters. Hell, half of the last movie dealt with Shia looking for a job and coping with his too-hot-for-him girlfriend.
The Transformers were barely characters in their own movies.