Provorov has looked solid with a number of partners, the ones he struggled with were Braun this season (Braun isn't close to top 4 quality at this point in his career) and Sanheim. But he looked better with York and Attard. So I don't think he needs a very specific partner to play well, just that he's not a universal fit.
But the same can be said for Sanheim.
Given Sanheim, York, Zamula and Andrae in a couple years, Provorov is potential trade bait, but there should be no urgency to move him. He's a high value commodity with a cost controlled contract at 26 years old, and the kind of player teams gamble they can bring out more from him in a better situation. The cost should be a 1st tier prospect/young player plus.
This Provorov thing isn't pretty. If the reports in the media about his touchy attitude are true, he needs to go. If they are false, someone needs to shut the **** up. His play certainly has become an enigma. To go from so promising of a young player to basically a guy whose performance merits the third pair is unimaginable. Something is off here. Perhaps it's been an injury or maybe he doesn't fit with Kevin and his pets but it's not a good situation.
What third pair performance? Just because a player doesn't live up to expectations doesn't mean he's awful.
And no fault of Braun, but he wasn't exactly the ideal partner this past season.
Provorov finished the season far stronger than Sanheim, even though he was paired with two rookies.