If we were to trade Kyrie for KAT, then Minny would desperately need a center. Maybe a trade like this could work if Boston did want to make that kind of swap:
http://www.espn.com/nba/tradeMachine?tradeId=yb58494a Boston trades Kyrie for KAT (Hayward assumes point guard duties on offense with starting lineup and when neither Rozier or Smart are in)
Minny trades KAT + Wiggins for Kyrie + Bogdanovic + Cauley-Stein
Sacramento trades Bogdanovic + Cauley-Stein for Wiggins
I think Minny agrees as they acquire the best player in the deal and it helps assure Butler stays. I think Sacramento takes this as need scoring, are shallow at the wing, and have difficulty luring max contract caliber players to sign there. I don't think Boston accepts unless they start to believe that Kyrie is going to leave.