Middleton just signed a 5-year, $70m contract with the Bucks. I don't see them trading that (as it might turn out to be a steal, depending on how he looks on his return and how much other FAs get paid in coming offseasons) for an Avery Bradley who is due a payday. Milwaukee rightfully feels that if they can bring out a Middleton/Parker/Giannis trio flanked by guys like Henson, Teletovic and Brogdan, they have a nice up-and-coming group poised to challenge in the East as Lebron eventually fades. Not sure why they would trade for AB now.
I'm all for signing Hayward in the offseason.