When Devin and JC's games were essentially the exact same and needed a ton of possession time to operate, yeah that wouldn't work. If you're trying to say at the end of the year he should've gotten Devin's minutes because the season was a throwaway then whatever, that's fine. Doesn't seem like what you're trying to argue.
I just don't understand bringing up this "play Collins more in 2015-16" argument when 1. obviously didn't have a negative effect on his development and 2. would've had a negligible effect on the season because of his game being the exact same as Devin's his freshman year. If neither of these things mattered, then wtf are we talking about it for?