I don't have a whole lot right now. After 10 scrims for me I feel pretty good about a lot of what you've implemented.
Tight ends seem kinda hard to figure out? Thru the first 8 games my TE had 31 catches for 123 yards and while my pass type distribution wasn't very long, my other WRs seemed more in line with the norm. And when I changed my gameplan to increase longer pass type distribution it didn't get any better.
Stamina is a little unrealistic when it wants to be. I mentioned it after one game but I have a WR who is A overall but has 1 stamina (6'1'', 196lbs), so during the first 3 games he averaged almost 8 targets a game then in a game he didn't have a single target. Since then (and after a gameplan change) he has followed that with 9, 13, 1 (stamina?), 14, 11, and 10 targets. I'm not sure the best way to realistically implement stamina in a sim tbh (maybe a minor injury feature?) but to effectively nullify a player for an entire game seems harsh just cuz they like the dank kush in the offseason.
Sacks seem a little low. This might be a complete figment of my imagination and it's completely in line with the norm but I've played 10 games now and after those 10, 14 out of the 20 teams haven't had a sack in the game (weird math there sorry).
Punters seem OP. I just looked thru all my games and basically every punter averages well over 50 yards a punt which seems about 10 yards too many.
These are just what I've noticed up to this point. I've only run 2 gameplans so I'm not too in touch with a lot of the smaller nuances of that aspect. Overall I think you've done great creating a pretty realistic engine up to this point.