Asking, expecting, or demanding Mitchell to carry the burden better than he does is unrealistic and really unfair.I think for him to step forward is to master that mid-range shot like CJ McCollum because he can get that whenever he wants, and it will open things up for him to get higher percentage shots from 3.
This team is really cool, but what they bring to the basketball court is quite mediocre outside of Mitchell and Gobert (and he isn't a player you can ask to do anything on offense but pick the lowest-hanging fruit). Both of those pieces would do well if we had a third serious piece.