I think there's a imbalance when we see the star levels of the players and, really, the benefit of this system to have a balanced system to take benefit of the players cound improve.

will suggest that, taking int account that, all these who are experienced managers know that, buy a full 6* team is not a guarantee due the internal limits in min/max % effectiveness/participation/contribution andtaking into account that we only have 28 days to develop the team and then if, we promote loose a star, I think the system should make profitable all the lower star levels, so, at least if are not all age ranges, 1* , 2* and 3* young players or less 25 years, should have a increase in the speed they win XP in the trainings, in order to stay faster during the same season period in a 4-5*.