I agree with you. As much as I love Ksenia, I don't think she can get a Worlds spot unless Kostornaia and Tuktamysheva are injured. But if Ksenia can have a clean skate at RC Final (if she's invited!), she would be my favourite to go. But I see that as a 1% chance...
Speaking of Kostornaia...I am not completely sure we will see her at RC Final. I have a funny feeling she might withdraw...again. And I also don't think we will see her 3A back anytime soon. I am probably wrong, but let's just say I wouldn't be surprised if any of that happens.
I think the Eteri team was masterful in disguising her weaknesses, the Plushy team not so much. And the little we've seen of her this season has been underwhelming. Sure, she had a troublesome season, but so did everyone! I wonder where Alëna's motivations are, I might be wrong, but it doesn't seem like she has the same drive and determination as Shcherbakova, Trusova, Tuktamysheva and others.