You see it quite a bit in Football. Managers taking whole backroom teams and signing lots of their old players.
A couple is probably fine. You wouldn't like to see the entire group of assistants replaced in one go though.
Definitely, and it does look like Dimma has a bit of pull still among the coaching fraternity and can pick and choose the guys he wants to work with.
The first of what is hopefully many examples of the Dimma effect.