I think he can still be productive. I'm personally of the opinion that his struggles were more mental than physical. I think he'll overcome those. I could be wrong though. My guess is next year will be closer to the start of this year vs his playoff performance.
I think Mike is likely to have another good RS despite his age....but even during the RS it was clear that he was struggling to beat guys off the dribble and go up against length. He was great as a spot up shooter and when getting good screens from Gobert, and I think he'll still be good in those situations, but if teams switch or trap against him I don't think he has it in him to be productive anymore. The other playoff realization is that while he can be a solid part of a defense in the RS, when teams target him it will get ugly. I think he has value for a team like WAS who is just trying to make the playoffs, but he won't be able to be an impact player in the playoffs.
#10 or even Rui/Deni + KCP still seems very rich to me. I wonder if you package it in with a potential Rudy-ATL trade or without a Rudy trade at all. I think ATL would be open to shedding some future money and trading Huerter/Bogdan for KCP + sweetner.
Bogdan/Huerter + Ish to UTA
KCP + sweetner (from WAS) to ATL
Conley to WAS
I think the Jazz ought to be really happy getting Huerter or Bogdan out of Conley.