Sure, but all three teams did 2 Russian Cup events, while Elena and Anton took part at only one RC event (in Kazan) and Evdokimova/Bazin skated only in Tallinn last weekend. According to the rules, Russian cup events are the only way to qualify to Nationals for those, who doesn't have GP assignments.
Last year Popova/Mozgov didn't qualify to Nationals because they withdrew from their second RC event after the SD due to Sergei’s injury (they were on the podium at their first event). They also took part at their third RC event in Moscow and won it, but that result wasn't taken into the consideration.
I understand that E/B had an injury and Challenger event was far more important for them in order to get SB and points. But I just think that it's not completely fair to make such exceptions for some skaters and be very strict with others