I get it, I really do. However these guys are professional athletes not some random pub team players. I'd expect to see this type of game mechanic around late winter/early spring.
Non league players are part time and play 2 games a week, but don't seem to have the same issues.
My staff take control of training but at a glance its usually 2 sessions a day.
Yes, I rotate players although if a player is in a fine run of form then natural I'll select them each week just like IRL, look a Saka at Arsenal for example. He never misses a game. If I'm winning with 25 -30 minutes to go I'll usually use my subs.
Tactics are slow tempo retain possession, Tiki -Taka and Gegenpress. However I've only used Gegenpress a handful of times as the retain possession is working for me at the moment.
This mechanic absolutely NEEDS to be in the game for realism, however I feel it needs tweaking.
Cheers for replying