Relegation is part of the game as for Promotion. What I think for star changes in such cases is that the only players who would earn their star back would be the ones you had before being promoted the league you have just been relegated from. This would also portray a fresh breathe for tanking players...

However, what I have seen in this game is the following;
managed teams take the first 8-10 positions
abandoned teams are taking the rest.

So why would nordeous make such a move for implementing this anyway? For abandoned players? It doesn't make much sense..