Definitively now the players get less trainning that last seasons, they reach their best level slowly, even in very heavy they train slowly too than before. And injury subjetc, ... now 5 injuries at the same time in my team for example, so, to have them in very heavy is worst because the trainning extra that they win, are lost in the 6-7 days that they are stopped when they are injuried.
I think is absolutely necessary the B team or a youth league for youth player because now, with this trainning rates, for the youths can reach 7-8*, they need at least 3 seasons playing in your team, and that doesn't compensate. Teams that are fighting for win leagues/cups, can't be using young players that have only 250,000G for example, youths must play, as in real life, in a specific team whose main goal is get players trainning.
B team, can be a very good feature for premium accounts, instead of the possibility of have many teams paying (even in real life a only owner can't have 2 or more teams), if you are premium you can have your B team where your young players are developped and they compete with other 'professional teams' until they are enough good players for can play in A team.