I rotate some players, mostly more "supporting " positions for my formation. These are positions that rarely rate over 7.5 even in a good win. Most goals come from AMC and ml/Mr for my usual 4411 set up. Any other position might score, but less influential. So my MCs, st, and defense plus gk can swap out match by match, either looking for a new candidate, or refreshing players with decreasing form. I do like to keep specialists on, especially CK since that accounts for many of my wins.

I will drop my overall Q when playing a weak opponent, and if I am expecting hard match will choose based on form rather than Q (though usually Q difference is 10-15 between same position players). I but replacement players focusing on positions which rate inconsistently, not just low Q. My DR and AMC are under 80 but play as well as I need.

I do keep a back up GK and sub him... Sometimes gk has a bad day and it seems nothing improved it, sometimes the equal Q sub suffers the same fate.