I wouldn't mind the skins if they didn't have different names and the statcount bothers me for some reason. Of course, these are both silly complaints that I can just ignore.
However, while the swapping weapons mid-game can be used for so many new possible strategies and all, it just doesn't seem too fitting to me. Probably because I liked how it was before and I'm just not used to the change yet, but still.
The balances are neat, though I keep hearing that Spy's were mostly silly changes and that the speed boost from DR and Big Earner can be used to exploit certain maps now. Don't ask for specifics on that bit though, because it was just something I heard in a server the other day. I'd have to google it and whatnot.