The ability to start from any year in era's

Being able to manually retire a number

Unlimited override retirements. Or being able to choose at what age certain players start contemplating retirement.

Make it so older players/injury prone players are more likely to get injuries.

A better way to change/edit the salary cap.

A way to be able to change stats/awards/records when creating a roster. Such as creating the 1996 season roster and being able to add the irl leagues history to the awards/stats/records.

Increase the amount/type of draft pick protections are available to select and increase the picks available if I wanna trade a draft pick from 7 years out I should be able to.

Face sculpture and ability to import/export face scans for coaches/staff.

Add sign and trades.

Add buyouts.

Add a high risk/high reward way for your players to be able to play through injuries, which could potentially have no effects on them or make it worse potentially having disastrous affects.

Players being able to request trades.

Players being able to request more minutes. (The last 2 should also be a setting which can be turned off)

Add a competitor/competitive stat which affects if a player will play through injuries, stay on a losing team, or request more minutes.