ok I have many crazy-ass ideas for rockband 3 and to keep the whole music game category form getting really stale first let me say I'll love love rockband 2 and I've bought over 200 DLC songs
now for my crazy-ass ideas

--you when it says you drummer is complaining play a hard song or you people want you to do stuff like benefit show it would be awesome if there was a cutscene with your made band to show that
it would be unvoiced and just text but it would be awesome

--add in a tinny bit of the sims
the way I mean is like this if you choose to go parting everynight you'll get tired and then get less fans but if you choose to say home all the time you'll be uptight and boring thus getting you less fans so you'll have to balance your partying and your staying home practicing

----pre-song chose your own adventure style choices
when in worldtour mode you pick a song you want to play and you'll see a little thing where you see your band driving to the gig then the drive asks you "should I take main street or park ave" and if you pick the wrong one BAM traffic jam and your late to the gig thus getting less money for the song you were going to play, another choice sleeping with groupies or not you might get in trouble by getting one pregnant or you would just get laid and you play better at the next gig thus getting more fans

the reason I say put this stuff in is because the straight just playing a song is lockdown harmonix knows how to do it you need start putting more stuff to do in it to keep it fresh
and yes playing songs is still what your going to be doing 80% of the time all this stuff is just in between songs