I'd be thrilled for Sinitsina if she's healthy enough to skate. I'd be very surprised if Medvedeva reaches that point, albeit if she does, the fed would certainly let her skate if she wants to do so. Although, they have a strong team for worlds with Shcherbakova and Trusova, so the third skater is just a bonus. I would hope Tuk got that spot, but I wouldn't count on it.

Given Kostornaia is struggling with her 3A, I'd go with Tuk in hopes of a sweep (the only thing stopping that may be Kihira), but Medvedeva brings nothing to the table at this point except her popularity. And, that's not a condemnation against her. She'd like to still be competitive, but she's just not, or just not now.