Greg Cosell had interesting thoughts on Brevin on the Ross Tucker podcast. He really seemed to get excited talking about him.
Paraphrasing here but he basically said Brevin is explosive after the catch but is a unique evaluation because he's not a refined route-runner and you don't see him do a lot of things on tape like work against press, work the middle of field, or match up against tough man coverage. Greg says that doesn't necessarily mean he can't do those things it's just a question mark until we see him do it.
The fact that those questions exist speaks well to how the staff used Brevin, giving him opportunities to be an athlete without needing to be a technically proficient receiver making difficult plays. This is something I brought up in regards to TE recruiting where Miami should be looking for the best athletes at TE not necessarily the "highest-rated" prospects who may be polished route-runners but limited athletes.