the big problem with minutes is the engine tends to try to get them regardless of fatigue at the time, so your players may (may) run into issues where they are on the court more fatigued than you would want. Fatigued players perform pretty shittily from what I understand...
If you think the frosh playing 15 a game is hurting your team more than playing some players at elevated fatigue levels would, do it - if you are sure, try it, scrutinize the pbp and adjust - and report back, I'd like to know the outcome...