Suggestion:
The best idea I've seen (IMHO)--The additon of real managers,with ratings reflecting their "actual" tendecies (historical as well as modern).
Reason:
Will add a whole new dimension,excitement and interest in this aspect of the game."Matching" players to Mgr.Being able to develop the type of team you enjoy. ---Being able to put in real Mgr. photos--etc-etc.
Priority:
Important: It should add a whole new interest in an aspect of the game.
As I said in my humble opinion

Thanks for your time
Gil