Fair enough.
The idea is that the team will always be better with self-trained players than buying older ones
I don't really understand what you mean. The NT is better with self-trained players? The NT doesn't train players. Your team is better with self-trained players? I don't think this is or ever has been the case. Surely people will still train players. You can't help but train players in this game.
Oh, and training isn't much slower, really. In fact, players will receive the same amount of training, just 10% less in much better primary skills and 10% more in other areas.
Once I scored a basket that still makes me laugh.