This software is inspiring. You've left out a lot of the BS in vbulletin these days and focused on stuff that really adds to the user (and administrator) experience.
I want to see more, though. Off the top of my head, I would like to see this:
1. A more intuitive template coloring system that doesn't have so many elements tied to one another.
2. Inclusion of a recent posts and/or recent threads sidebar palette. Yes, there's are add-ons here, and they're nice, but you should have this as part of the software. Lots of folks look at that list first.
3. Built in gallery system?