I don't think he's putinist. The criticism is that he's too accomodating or naive with respect to Putin. He used to blame NATO as the agressor when Russia invaded Crimea. He thankfully later realized Russia was quite agressive given they launched a full scale invasion.
Thanks for quoting his recent position on polling in Dombass. You're right, it seems taken out of context by commenters. It's still clumsy and early to discuss Ukraine giving away territory, when they're fighting hard to avoid it.