Stuff that would ruin the movies for you:
-Sex scene(s) (It's one thing to talk about it, joke about it, but to actually show it, or give a really good impression that that's what's going on. Absolutely unnecessary.)
-Language (After seeing these films, I know going in, that there will be profanity to some degree. For me (or anyone else) to expect otherwise is just silly. However, less amounts of it, and less intense words would go a long way. And no more F-bombs. I know why Mikaela said it, it was realistic, but it wasn't necessary given that it was TransFormers.)
-Excessive violence (Granted, it was robot on robot, unlike The Rise Of Cobra and it's human on human violence, Optimus Prime really pushed the boundaries. Had it been a human instead of Grindor having their face/head split in two, this would have a hell of a time getting R, most likely would end up as an NC-17. Plus G.I. Joe, while intense, the violence fit, and worked better. TFs should follow that same style, but without over the top gratuity for the gore pr0n enthusiasts.)
-Excessive runtime (We're already being pushed to our limit with 2.5 hour runtimes, and Bay should take this to heart: LESS is more. I'm not saying we should have 'em crunch it down to 90 minutes (we saw how that turned out with Quantum Of Solace), but 10-20 minutes wouldn't do a bit of damage.)
-Controversy (I can fully understand why the public finds the twins to be offensive. At one point, I was sure how I felt, but now...I dunno. Either way, it's easy to see why folks would be all pissy about it. Tone down the potential racism, sexism, etc. It's not always needed to sell a flick. And if you are going to be racist, have it be the humans vs. the Cybertronians. Make it an allegory to what's going on in the world, or something of that nature.)
Beyond that, ROTF is everything I wanted in a TF film. I hope Bay learned his lessons on this one and not only continues the trend (learning, that is), but uses what he learned to deliver a slam bang action thriller with better handled comedy (when needed) and heart. The wow factor sells itself with the TFs, period. I think we've had enough wow factor out of the Baysplosions as is. Is there such a thing as pyrotechnics pr0n?
NOTE: Realize that I am not a perfect Christian, nor do I profess to be. I apologize if anyone's ever offended by me, I'm not perfect. Don't hold my posts and opinions against other Christians.