Lots of good things said above.

I want much more realistic player movement where weight and momentum are a MUCH bigger factor. Options for momentum much like game speed or threshold would go a long way to making people happier.

More arc on passes/less LB or DB swats. Better yet, bring back the knockdown slider from NCAA 09 and prior which allowed us to adjust this ourselves.

Better shotgun blocking, particularly for the cpu when running the spread. The cpu still does not come close to being dangerous while running this offense. A shotgun running slider could help.

More personality. I want scat backs to run like scat backs and power backs to run like power backs. The logic for how to run looks the same for all cpu backs regardless of abilities. Furthermore the juke, stiff arm and truck moves were far too weak in NCAA 12 and need to be better. Eliminate the dual stick controls that nobody uses if necessary. Add an option for sim vs. arcade so some moves are more effective. Either way these toned down moves made the cpu running game boring and hurt the fun factor for the human game imo.

I want playmakers to stand out more. This is especially true at WR where the cpu completely underutilizes big time WRs. They make no extra effort to get them the ball.

Better end of half/game management from the cpu. Their use of timeouts is predictable and poor. Same for spiking the ball.

Tie weight to recruit ratings. I don't want to see a 6' 7" DE that weighs 198 pounds listed as a run stuffer. It wrecks the realism in recruiting.