I'd very much like to have alerts and the phone ringer be separate volume settings. It drives me crazy that it isn't, and I really could use the ringer higher, but then my text/email lower. Almost off.
I just updated to 5 on my 4 yesterday, and finally got my favorite custom text tone on here... Except it is wayyyyy loud. Back to iTunes to try to lower it.
I guess I will go start leaving feedback for it....
ETA: and while we are adding complaints, mine is the stupid chat bubble interface in messages. It's a poor use of space, thankfully you can swipe the keyboard away now, but dang, I knew wasn't going to like it, and I don't. And yes i have submitted feedback on it.