We are not getting a positive asset for him. That's the thing with player options - it allows the player to play their free agency perfectly. They can survey the market and know perfectly well what's out there for them. And since he opted in, this means no team told him they will give him that type of money in FA and thus no team considers him a positive asset on the contract. Thus no team will give us positive asset for him.
With that said I don't think this contract is some sort of debilitating negative for the team. We can treat this season as a "prove it" year for THT without much opportunity cost. He does have some talent, but he definitely needs to be much more offensively efficient if he wants to be a rotation player on a good team going forward.