Gameplay Improvements....

1) More running styles would be nice...it would definitely add more depth to an already great mo-cap system

2) I would love to see the "helmets pop off" feature make it into next-gen gaming...I know it doesn't happen often but man would it be nice to see in the game!

3) Unsportsmanlike conduct...such as excessive celebration(spiking the ball), taunting(high stepping) these thing are subtle but add depth to gameplay as well.

That's all I could think of off the top of my dome right now...I'l post more when it comes to mind!