I did manage to get through half of them with no issues just recently, though. I'm sure it won't be a problem, just potentially frustrating if I have to re-do any of them, especially since the 4 I have left are ones I've already played before.
And as for Frampton, it's kind of funny how I'm the exact opposite. I make a point to get every song that becomes available in RB especially if it's already in GH. Especially after RB3 added Pro Drums, I never want to have to touch GH again if I can avoid it.