I think skepticism is warranted. He piled up numbers against off-coverage and soft zone on slow developing downfield routes. He's tall, fast and he can adjust to off-target throws (although he doesn't pluck the ball with his hands away from his frame). That doesn't mean he can release vs press, win the ball against tight coverage, or make tough catches across the middle. Think of it like Jerry Jeudy at Bama vs the NFL - similar type of adjustment.
Miami doesn't often see the type of coverage looks he faced, and the caliber of corner play increases dramatically from FCS to ACC. I think it's fair to question his projection even if he's a clear upgrade over Wiggins.