Players lose a 20% exactly, if a player is 6 and 3/4 will drop to 5 and 3/4 ..... there's no mystery in that. Players lose 5AvQ - average quality- cause in the next level is 5 AvQ points more difficult reach every star....
In the old version, 20AvQ at L1 was 5*, then in level 2, to reach the 5ths star you needed 25AvQ and so, is not that you lose quality exactly, simply once you promote every level is a 20% further away than the last level. So the lost, is exact, 1 star, 20% of AvQ, the 100% of 1 star as you say.![]()