Hebitsukai said:
I like it...and I even give an ad-on to this:

Managers that do use the junior team as a team itself...and not just for training (having no team whatsoever)...should get better increases on stats (for instance, instead of +0.1...give +0.5) for players that do make an actual team (as a green player in his position) and do play games (favour the players that play, instead of the benched ones).

This would make managers try to make some sense on ever having a junior line-up. Or else dev's should simply just take that junior line-up thing off...if the objective of junior squad is just to make money out of their youth.

This idea would never pass as a good idea because, the top players, only want to use the junior squad to train and make bucketloads of money. But at least you have one that liked it.