Something I'm not really happy about is unlockable content. What the fug is that about? I paid for the freakin' game--give me immediate access to all of the features thereof. One thing that I was really happy about in RB3 was that there was no unlocking process for the setlist. There was a bunch of unlockable crap in RB3--clothing, instruments, etc--but nothing that I would ever use.
I guess it's supposed to be incentive to progress, but it just pisses me off. They have a $5 downloadable pack of unlockable pedals and such--I'd grudgingly give them another $5 just to unlock all of the mini-games.