I do however believe that the suggestion put forward (264484.87) about increasing training speed is worth further debate.
I've always contended that for new managers the time investment is too high. It does not necessarily mean that you need to increase the training speed (say a 10% increase or so), you can also change training in other ways to make it more appealing or engaging.
I train big men. I had the best record in my league last season, despite training OD/PA 5 weeks. Training OD/PA for big men (or IS/ID/SB for guards) means running a very high risk of losing one or both weekly games, because you have to field a very subpar lineup. It's not as bad if you train SF, as they should be more balanced players. It takes a lot of commitment (and also some knowledge of the game) to train players out of position and truthfully it makes the game more challenging.
The way I see it you can either simplify the training system to make it easier to achieve full training as some are advocating (train players irrespective of the position the play at is the most common proposal) or increase the rewards (increase speed, allow training of more players). As things are, it's just really hard and not rewarding enough compared to buying fully trained players.