I voted:
- WR/DB Interaction
- Offensive/Defenisve Line Interaction
- CPU Ball Carrier Logic - Usage of special moves, improved ball carrier vision, using the entire field when running
- Tackling
- Ratings - Expanded IE: scramble, deep throw accuracy, medium accuracy, short, accuracy, throw on the run, DPP, roll out
As much as I would love to see those other things updated to make the game look better, I would much rather have these updates that would, in my opinion, make the actual play itself much better.
I will try to write a bit more on this subject this afternoon when I have more time.