Biggest mistake they made was not allowing exportablity, the second mistake was abandoning DLC. My copy sits collecting dust while RB2 gets played constantly. I don't care enough about it to look at is a stand alone game, which is why I waited until I found it for $20 in the Gamestop Bargain Bin before I bought it. Had the songs been exportable, I'd have bought it on release day. I'm not a purist that gets all weepy at the thought of a player created avatar playing "Eight Days a Week". To answer the stupid point/question that is always brought up in these threads.....yes, it is too much of a hassle to change disks.
BTW, I come from the "switch out the cartridge on the 2600", "stack the LP's on record player", "get up to change the channel by turning the knob", "use a roadmap to figure out where you're going", "watch the tv show at the time it's aired or wait until next year to catch it" era.