This was my comment on this topic and it may not make much sense but still, this is the way I feel about it:
Mims should be one of the main guys, with his talent and size, he can learn as he goes. I guess I’m not thinking about this rationally and of course the coaches know more than I do but DAMN. This kid has talent and size that is rare and they need to use that constantly!
IMO, he needs to be the starter opposite of Corey Davis and the rest the guys can swap in and out in the slot. I’m sure they have plenty of 4 and 5 WRs sets where he can constantly be on the field. Just my opinion though, I guess!