Okay, there is one thing about Rock Band that is astoundingly worse than Guitar Hero III.
Struggling with a song? In Guitar Hero, you can slow the song down, start at the beginning of any section, and play through the end of that section or any following section. Repeat as needed.
In Rock Band, you can play the whole song. At normal speed. That's it.
Struggling with a phrase/riff at the end of a song? Especially a long song? Take a nap and wait for it to come around.
I wonder if that was EA's decision. (joke. Well, sort of.)
I hope this is corrected with a patch. What a terrible decision. What the hell's the point of practice if you can't practice what you want?