Re. injuries. Putting injuries back in is doing nothing more than adding a factor of randomness. Good coaches should want game results to follow from skilled play, not added randomness. Crappy coaches should welcome injuries as a chance to get the random luck they need when they don't have coaching skills.
Injuries are part of the real-life game this is supposed to simulate. Good coaches would evaluate available risk factors (DUR rating) and plan accordingly with backups and avoiding high-risk players. I wouldn't implement injuries without larger rosters to allow for potential mitigation.
Re. expanded rosters. Great for the top teams, not so much for everyone else. The top teams already skim off the top players, especially in D2 and D3 with the added help of vision. So, expanded rosters, more top recruits on the top teams. Good for those coaches, bad for everyone else. Bad for competitiveness and parity.
Expanded rosters would probably need a modification to the recruit generation subroutines, so that more players would be available in the mid- to mid-upper range. But, I wouldn't expand rosters without implementing injuries. Just having more players
Re. animated play results. You mean like moving comic strips? Swellllllll.
I mean something like this (I hope this link works).
https://glb.warriorgeneral.com/game/replay.pl?game_id=3033651&pbp_id=301696
Re. Conference Re-Alignment, Individualized Practice Plans, scrimmages. Could be okay.
If WIS figures out an equitable way to reduce the number of worlds by a few, now THERE would be an improvement.
The goal should be reducing the number of SimAI's by increasing the number of players, not contracting the existing pools. However, I have an idea of how contraction could be pulled off. Historically, free seasons only provide temporary spikes of newcomers, with an overwhelming majority of them abandoning their team, largely due to the steep learning curve.
For holdaway : Individual Practice plans would be per player. Say you have an OL that has high STR but low block, you could have that guy concentrate on blocking drills, where an opposite player (low STR, high BLK) would spend more time lifting weights.