if follow current rate of growth, of course not logic, currently all players especially FT is too fast to develop and too quick to lost the 20% after 4 weeks.
need to reconsider to change the current rate of young player growing and another think like i said, his growth will stop at certain age and even decrease in time or decrease if occasionally play/trained
and no more 20% reduction. nobody will tanking, perhaps no upselling gonna happen also
and if you want to build quick 140%~160% team, you need to invest much resource and effort. much fair