I think it has more to do with playing three rookies in the rotation rather than just Brice in isolation. Three rookies getting heavy minutes is a disaster. I just can't see how they use 3 picks next year.
My thought is that the Jazz have someone in mind to acquire during the draft. And are collecting vanity first rounds to up the perceived payment. Trading 3 or 4 first round picks is pretty sexy, even if one of them is that late pick this year. They have a young player to trade (Brice, maybe Hendricks) salary ballast. with players who don't actually suck (Collins and Clarkson) In that situation trying to resign Olynyk and Tec doesn't make a lot of sense and could complicate things.
It wouldn't at all surprise me to actually acquire Murray with the three picks that we might conceivably have with Sensabaugh and Clarkson going the other way. It isn't great value for them, but the number of picks helps them save face and we aren't really tapping into our finest pick reserve yet. Ot maybe toss a couple of those in and get Trae Young. . .