The thing with Pitts is that you have to lump him in with the Smith / Waddle / Chase group. Would you take any of those at #8? Cos essentially he's a big WR.
At best he'll play as a Flex-TE for the first few years in the NFL and, quite frankly, you're wasting his skillset if you ask him to play as an in-line TE.
He's at his best when you can isolate him out wide against a player and let him use his array of moves to get open. That same array of moves he can't deploy if he starts with his hand in the ground.