The only kink I have seen so far is mounts disappearing. Luckily I had some spare's in my bank so I am able to get around still. The other thing I have noticed was that I was in Zangarmarsh and I could see people /s in Ogrimmar. I could also see emotes from Zangarmarsh. I just don't know, I might be at a point in which it is better to just reroll a character and relearn everything on the way up.