Average NFL Punt Return is 8.6 yds. I'm sure you can get that if you just increase the CPU punt length. Special teams are supposed to be chaos, just watch a game and count how many unblocked defenders there are on special teams plays. Why do you think that there are so many more illegal blocking penalties (holding, blocking in the back, etc.) on these plays compared to normal plays from scrimmage.
The blocking that needs to be introduced is zone schemes in the running game. NCAA has tried this the past two years but the linemen don't get to the second and third levels of the defense.