So since Russia has already qualified to Final 6, I feel bad for Zemchenok as he probably will get cut when Mikhaylov joins the team.. He has made a big contribution from the 1st week when Poletaev was still a big question mark. If I were Maxim, I'd be guilty of taking someone else's spot especially when you havent played a single match going to the Finals..
Trusting key players is always the tradition for Russia NT. Even if Kovalev played great in VNL's final 6 last year, he still can not earn a spot in WCH. As long as Maxim and Poletave are healthy, there is no room for Zemchenok. He will play for Kazan next season, obviously as a sub for Sokolov.