It is really a great job what has been done to the game engine so far. Of course, it is not perfect, but I think it is already quite realistic.
In my opinion, changes should be directed only to make the game closer to real basket and not to solve the managers problems. It is the manager who should adapt his/her decitions to the game and not the opposite. The amount of minutes only exists because of the BB training mode. Nothing to do with real basketball, so I don´t think making it easier should be a priority. Unrealistic line-ups like having only one player for one position are not supposed to lead to logic results.
¡Me aburro! (Homer Simpson)