How would you go about training then?
Rugbymania (www.rugbymania.net) has an excellent system, whereby there is team training and individual training. You choose a skill for the team to train and you can set a certain number of individuals in the team to have extra training. The individual training is a lot more effective than team training. You can train more younger players (17-20) than you can older players (21-29). Players 30+ don't get training, except for experience.
This makes sense. It doesn't make any sense whatsoever for a player who plays PG or C to not be able to go down to the court and shoot 500 shots and improve his outside shooting. It's simply ridiculous.