The current coach is Besnik Hasi, he used to play for us as midfielder, entered the staff a few years ago and when John van den Brom was fired last season one match before the start of the play-offs, he got his chance. He won us the title while, at the start of the play-offs, we were only 4th, 8 points behind the leader.
Proto is still our GK, he is 31/32 or something like that so he is not finished yet.
I think you mean Preud'homme, and he indeed is coach now, he is coaching Club Brugge.
My take on Eric Gerets is that he, together with Preud'homme are the two best Belgian coaches we have.
In my opinion, he could indeed have become coach for European top clubs, but he decided to go for the money a few years ago by signing contracts in oil countries and appearently, he likes it there because he didn't return yet.
He is mentioned to be the new coach for our NT once Wilmots decides to go for a job as a team coach, I hope this is true.