Costume is rather a prize for the designer than for the skater. Not that Ryabenko or Bobkova don't deserve recognition, but that should be a category for designers. With Anna nominated for costume it's something like a consolation prize for being left the third behind Sasha "the quad queen" and Aliona "the artistic one" (by appreciation, not by results). So when the question "don't we want more diverse category than just three Eteri girls" was probably asked (or whatever way they decided the three names), she was the one who was left behind even though she was above You and Sasha the whole season (apart from results how about first lady with 4Lz in a combo or first lady with two 4Lz in a competitive program).
But that's not just about the skating awards, it's rather the top of the iceberg than the problem itself, the last season scoring was weird on several occations (concerning precisely Anna and Alina), we've talked about it already (without consent) I don't think it's necessary to repeat once said arguments.
ISU works in mysterious ways, they did what they did and I was reconciled with that, cause as I've said competition results are what matters. But I'm little disappointed that Eteri did consent to propagation of that mess, even though she looks like Galadriel in her speech.