Yeah. This was a brainstorming list, not a finished product kind of thing. Some of the specialties are kind of harebrained and others would be easy to abuse. Any addition like this would need weeding out.
I agree that if this kind of thing were added to the game, the head coach type should be visible to all players. That would probably be a tactical necessity. It would also be a good simulation of real life where coaches have reputations for particular strengths.