Saw it tonight. I kind of spaced out the last 40 minutes or so. I was coherent and caught everything that was going on, but I was just kind of there. Not sure what the reason for that was.
The Chicago battle is pretty much non-stop with humans and robots going all over the place blowing shit up. Kind of disappointed in how weak the top Decepticons were once again. Shockwave isn't really all that important and is really just kind of there.
As for Carly, I didn't find myself connecting with her. After 2 movies with Mikela, I didn't feel like I got to know here character enough or really get to feel her and Sam's relationship enough to care if she lived or died.
Silly humor remains, though probably not as much. What was there, some of it I found funny, some of it not too much.
It's definitely a candidate for editing. I'll sort out what I think about it more when I see it again tomorrow in an ETX theater, and I'll try to sit farther back this time to maybe help absorb it all.