Training just needs to be made faster, and the best way is for players to improve period, and the best way to implement this is to have a let trainer decide option. Perhaps with a couple of flourishes such as deciding on primary or secondary traits, improve weaknesses or maximize strengths.
Another idea, and its along the same line of the gent who suggested a new server, 'buzzerbeater unversity" this game but in a college version. you decide what type of school you are, jock factory or ivory tower. you train guys who are 18 to 21, some might improve quick enough to leave early, some may flame out, some may flunk out. Impart the rogue elements of the college game, offer no show crip courses, golden handshakes, seedy characters rumored to be associating with your players. overstep the bounds, get put on 'probation'. I think people would eat it up, and it would be a good way to give the NCAA a middle finger which it needs to get often as they can.