My question was answered.
"Are Heat going to role with only Herro and Rozier as primary ball handlers rest of the year?"
Nope. I remember Mitchell from Baylor, but haven't followed him in NBA. Going in to draft he was considered the best defensive PG in the draft class.
https://nbadraftroom.com/davion-mitchell/All in all Heat did pretty well with the limitations/demands from Butler. Roster is more balanced. Herro will be the engine that drives the offense. It's not enough to compete with elite teams unless somehow Herro, Bam, Wiggins, or even Ware show us something we haven't seen yet. But, there's a solid rotation with Herro, Bam, Wiggins, Ware, Jovic, Robinson, Mitchell, Jacquez, and Larson.