The number of good OH is limited in Russia. But there are several decent OH who play in this position which is something Pilipenko and Smirnova did not do last season. Possible players with pretty good reception skills: M. Frolova, Chaplina, Zvereva, Shvchuk (attack is weaker than the others), Shcherban, Kotikova.
Yes, kurilo is pregnant, Parubets is injured but still I can add three more names to the list Simonenko, Krotkova and Ezhak ( at least she is the current champion of the Russian league). Well, now the roster doesn't seem very limited to me if tbh. If we take two of them who have the better reception and more experience (Frolova, Chaplina), we can complete the roster in this position (Frolova, Chaplina, Voronkova, Fedorovtseva). Well, it's not like we need 15 outside hitters, or it is not like other national teams have 15 decent outside hitters with better reception. Well, it's not football, so we don't need 21 players, so we could complete the roster with two decent outside hitters (I'd go for Frolova and Chaplina, or Krotkova and Chaplina) imo.