Reading through this thread, there still seems to be the notion that it's 'impossible' for more players to be involved at first team level.
The argument, especially, about senior players getting upset, is frankly ridiculous.
If they get so upset & sulky being rotated, that it affects anything in a bad way, sell them. If it makes them more determined to play more often: GOOD.
It's a 'problem' which is nothing more than an excuse.
Then there is the argument about Foden having the bench spot. Easily solved. When he's on the bench, actually use him much more. Then have him on the bench a bit less often & put someone else there sometimes.
Abacadabara, another space opens up, just by actually playing Foden a bit more. He gets more game time less bench time.