Yeah the question "I am familiar with the star players, and am not afraid that they will be transferred" dropped from 4.5 balls to 1.5== can this increase back up if my foreign players play well?
This point doesn't depend on your players' performance. You just have less balls there if you transfer players.
Just wait a while and if you don't do too many transfers, it will improve again.
We have both said a lot of things that you are going to regret.