Ok, so my one buddy has a modded 360 and he has this already. So naturally I been over there playing quite a lot. There is one thing that bugs me about the game, and I don't know if it's been talked about in this thread at all.......that is the Rock Band 2 scoring system. Yeah, not so cool (at least IMO)
So the way it keeps track of scoring is kinda borked. It gives you an overall score, which takes into effect Rock Band 2 songs and any Rock Band 1 or DLC songs you may have played while in Quickplay or Tour mode. Then, it also gives you another score which only counts for any band things you do.... (i.e Tour and Challenges).
The thing that really sucks about the scoring IMO is that it doesn't break the scoring down by instrument. For example, when we look and see the high score for "Eye of the Tiger" it just gives us one score, it doesn't give us a high score for drums or guitar or vocals individually, just one over-arching score (which then goes toward your overall score, and may or may not go towards your band score, depending if you played in Quickplay mode or if you played it in Tour mode with your band). So basically, It just displays whatever the high score is for any time that you've played the song regardless of instrument. Pretty annoying if you ask me. I don't understand why they would not break it down.
Also, a little quirk we noticed is that (and I don't remember if this was the same for RB1) but that when we played in Tour mode we played a song on hard and got 5 stars on it, so it marked a little "H" by the song and put 5 stars next to the name of the song on the venue screen. Then we went back and tried that same exact song, at the same venue and all, on expert and got 4 stars on it. When we went back to the venue screen it displayed a little "X" by the song to denote expert, but there were still 5 stars by the song, even though we only got 4 stars while playing it on expert.