Right now, I need to know who, on the Texas defense, is going to rush the passer. That's the position I don't have anything more than an "I hope someone develops" answer for right now.
Of secondary urgency is the OL. They were much improved last season, but not dominant. We played so many true freshmen with limited depth last season, so that's actually complimentary. After another year of development under Flood, they should be road graders. Since we won't have Bijan to erase mistakes (our returning backs aren't junk, though), they'll need to be a team strength. Rather than hope, I can articulate why I expect that to happen.