Kovalev and Butko have the same style & strength but Butko is more stable. I think Kobzar will still be the main setter and team captain. Semyshev is young and have so much potential and it make sense that he is getting these experiences compared to Podlesnykh who I feel very limited offensively. Im very happy they are willing to develop Semyshev because I really think he is very good allaround. I am surprised Karphukov did not get a call but with Voronkov playing really well as a back up Im ok with it.
If there is any consolation for not getting called in the "A" team, Kovalev should be the main setter in WC as the main team will play in Euro Volley