Eteri teaches technique that only works on children, so good luck to Zagitova ever regaining her 2018 jumping level which she would need to even realistically be in the fight for future teams vs a slew of girls who can outjump even her former top level. If she has the balls to try a major coaching change, she might just maybe have a shot, but then again Evgenia tried that and it hasnt exactly worked out either. Still even Evgeni had the good sense and saw she would never keep her jumps, which were already declining in 2018 hence her losses to Zagitova, into adulthood with Eteri's technique.
Tuktamysheva turned back the clock and had her best year of skating hands down after only 2015. I was super happy for her to witness it. It still was not enough to make it to Worlds in a year Zagitova and Medvedeva had awful years, Medvedeva especialy, and Kostornaia, Shcherbakova, and Trusova were all ineligible. Yeah she was probably unlucky to fall ill before Nationals, but if she manages a future big Russian team at this point I will be slightly amazed. That is why I feel gutted for her, especialy if she had not been ill before Nationals and skated at Europeans she atleast might have made it. As you said she falls short of the others in everything but having a triple axel, and that isnt even that big a deal anymore when there are many Russian and Japanese girls with either a quad or triple axel, some better than hers.
I think Medvedeva and Samodurnova have some chance moving forward, Samodurnova moreso of the two at this point IMO. Sofia seems like the kind of person to take the Elena Sokolova or Anna Pogorilaya or Leonova former spot as the reliable (well not always reliable in Anna's case, LOL) perennial #3 girl on teams, she fits the role perfectly. Zagitova could be in the fight too but probably only with a coaching change and completely revamping her technique like Medvedeva is trying to do now. If she stays with Eteri she will have a very hard time making any future teams after this year, in fact I see her retiring well before the 2022 Games if she stays with Eteri.