This was not happening to me and I thought it was because I was using SFDC on the scrimmages with my best players on the bench. So they would still come in and get minutes.
However I was wrong. On my previous scrimmages I had minutes well divided between my players only because I won with early blow outs.
Yesterday my scrimmage was harder (no blow out for me) and my starters played 48-48-48-40-48 minutes, with much better players sitting on the bench for them.
I was very dissapointed, because if I wanted to do that I could just set only 5 players to the game (each one as starter, backup and reserve). I don't need SFDC for that.
So this is it. I am done with this. SFDC IS USELESS. DON'T USE IT. YOU WILL LOSE YOUR GAME AND IT WILL NOT HELP YOU MORE WITH YOUR TRAINING.