Nothing wrong in gaining a star as it reflects reality. Eg if Rooney from Man U drops together with Man U to the lower league, his 5 star ability in upper league has to be reflected correctly as six star in lower league, if not, there is no difference between him and a weaker 5 star lower league player who was already in the lower league. Rooney's relative skills in lower league compared to the players in lower league is much more pronounced there