I have a few good players who go on runs and get 7 to 9 match rating, then they slump and return 5-6, even 4 at times.

And I am only talking about league matches. I rotate for CL & Cups.

I noticed that if I drop them for 2-3 games and put them back in, they will get their form back. Not sure wht the GE logic is tho.