If we think that 12 players will go to the Olympics, Lazareva has less chance to make it Olympics because you can't take 6 hitters to the Olympics imo. Yes, I think the rest of the players (Kosheleva, Goncharova, Parubets, Voronkova, Kurilo) are real candidates for the Olympics.
Russia can take 6 hitters IF they only bring 1 libero (Malova) but I don't think this will happen. Last spot is between Kosheleva and Lazareva and I agree with you Koshe has the edge on paper and experience-wise.
Btw, good to see Lazarenko in A-team. I think she will be the perfect 3rd MB in Tokyo (can also be used as serving sub), but I believe the coach will call Efimova