He has received more of an opportunity through two years than he had any right to hope for after the Bucs drafted him. He's a poor blocker, he frequently lines up in the wrong place, he's not a good route runner, he drops a lot of passes, and he doesn't play on special teams (even Kupp was returning kicks yesterday). He won't last in the NFL.
He was their primary slot receiver over the last month of the season and you would never know it because either he wasn't getting open or Brady didn't trust him.