Judging from some of the posts around here, it seems obvious the most sought after features that have NOT been touched in this version would be
1) Enhanced tools for scoring to picture, (also see "Quicktime scoring blues" thread)
2) Staff View updating
..in no particular order.
The workflow thing was a huge deal for lots of people and they seemed to address that first, so hopefully after the release of X1 and the workflow thing 'out of the way', they can spend a little time with items #1 and 2.
BTW, I was sold on the upgrade when I saw the multi-tool option!
Anyways, back to the wish list, I would say items #1 and 2 would be at the top for many people and could potentially make a decent impact on sales.