I dont know if anyone already suggested something like this, but I think that would be pretty cool and should be not so hard to implement for the developers (at least I think so :-):
It would be nice if you can group tracks together. For example you have a pull-down menu at the top of the Pattern-Editor, where you can define groups, for example:
Track 1, 2, 3 and 4 - Drums and Percussions
Track 5 - Bass
Track 6,7,8 - FX
When you “Drums and Percussions” only Track 1 to 4 are displayed. All other tracks are hidden and so on.