Introducing relegations would be very good.
Having all the teams in a single server, introducing promotions and relegations would make the game closer to real football.
I add that would be nice to create a global leaderboard (same as Asso) where every team will gain points weighting level reached, title won and position in the league.

You want to win titles? You need to sweat!!! Maybe staying seasons in the same level.

Currently the game seems a village tournament.
Win every season against samel 5 people and that season after season after season after season......