I apologize if this has been brought up already, but thought I would mention something I am noticing in case it's unknown or a bug.
I am using the new Universe mode and I have been editing players through SQLiteStudio and when I import them back in, although I may have changed a great deal of their ratings, their overall and potential star ratings are remaining the same. I haven't tried actually simming anything yet to see if this actually has an effect on the game itself or if it is purely aesthetic, but I thought I would bring it up.