You don't seem to understand. I said: does the trainer level now influence the training for FT, ST and GS, regarding that 10% going into cross-training. If it does, it would be perhaps more profitable to train FT, ST and GS with higher level trainer.
If your players start out at FT and ST skill at 1. Then it might be profitable to run stamina and free throw training the whole season (remember it might still not be profitable). What happens after that?
I think you should fire your lvl7 coach and go with your newly discovered great training plan. I dare you!