you missing the point,
its not ment to find out when the skill will pop down to the decimal point. its so people know when to change what skill they are training to make to best out of there training for training balanced players
there's no need for that
it's not a single level that matters in training balanced players
exactly... any level is like a 5%(1 of 20) of total possible achievement in a single ability, and an unbalanced player is someone having for example a 70%(marvelous) of the total in , e.g., inside defense and a 20%(inadequate) in rebounding..... and there is far more than a player with such characteristics(well maybe not so pushed, but at least some exceptional instead of marvelous with less than indequate)....
a good suggestion can be that drafted player should be a little more balanced themselves, because is often happening that the drafted players are themselves really unbalanced...