The suggestion of putting someone in charge of 22-25 year olds, I think, is an excellent idea and provides managers not only with information on how to train there player to get the best out of them but as motivation to get them at a level where they can make the national team and bring in extra merchandise for the club.
I would love to take on a role like this, however I don't feel I have enough experience training every position. Now I know how to train guards, I've produced a few decent U21 guards over my managerial career (I have had previous accounts) but the problem is I've only ever had one trainee with potential of MVP or higher so they cap far too quickly. I've also trained big men a bit but not enough to provide a manager with a 3 season plan during the ages if 22-25 as I wouldn't want to jeopardise the managers chance of having a NT player or having a player who will end up having too high salary to manage.
I have also never trained SF's, so I would be a bit unsure of this, although I believe it may be a combination of both.
What I am trying to put across is, for us to develop as a nation and compete against teams that are fortunate to not only have a large training base but hundreds of MVP+ players each season of the draft, a role like Elmacca suggested maybe needs filling and I believe it should be a manager who has experience training both guards and big men.