If I'm Grant, I'm eyeing free agency, so it's on Brad to sign him to a deal that keeps him from hitting the open market. I think they sign him and I think its for an amount that will have many here screaming 'overpay'.
I think they'll have to overpay to get him to sign an extension. If I'm him, I want above my current market value or I'll see what someone else is willing to pay.
He's got a bit of an old man's game, but he's great at it - and now that he can hit the 3, his market value skyrockets. Keep in mind Ime trusted him to guard Giannis man to man for a good part of the game last night, and he did a very good job. His skill set is one that most teams in the league would want - not as a role player, but as one you build your team around - sixth man or starter level.
If he hits the open market he will get paid - a lot.