I guess Milwaukee's motivation is 2019/20. They can likely still be under the tax and give Jabari $25M next season. But then Middleton and Bledsoe become FA's. But they may only be in the tax one year until Henson and Snell drop off.
I guess sending Henson back is value for them. But it may put Utah in the tax if they give Jabari a ton of money, add $10M for Henson and still want to re-sign Hood and Exum. I don't see the Bucks really valuing the rights to Hood or Favors as they'd be looking to decrease payroll for 2019, not add salaries.
IMO, a trade that might be acceptable to Milwaukee would be Favors + Thabo + lottery-protected 1st for Parker and Henson.
1. Milwaukee gets immediate help for the playoffs this season. Favs is just a 1/2 year rental, but they might want to keep Thabo next year. They won't be in the tax when they re-sign Bledsoe and Middleton.
2. Utah may/may not make the playoffs. Getting Jabari is worth giving up a pick, but not one in the lottery, especially not 2018 when the draft is pretty solid for teams that miss the playoffs.
Oh, and as an aside, DL mentions the cap space Utah can clear this summer. Asks the Bucks GM if he is aware Parker is Mormon, and golly gee, wouldn't the fans just love to see him in that orange Jazz uni. Just so the Bucks believe it's going to take matching a huge offer to keep Jabari.