1-4 promoted and qualified to champions league
5-8 promoted and qualified to super league
9-11 stays in the same level and loses 10% quality
12-14 gets demoted without losing quality (if they get promoted back, they will lose 20% again)
I can guarantee you that no active managers will be placed between 9 and 14, only dead teams. Unless until the game is clean and higher level leagues are full of active managers.
Another good idea, that someone mentioned above, would be to increase the league rewards by giving some tokens and rests (nothing crazy, but decent and fixed -that doesn't increase at higher levels- amounts)