I agree that Alina doing her 3lz+3lo in her Black Swan EX version is pretty gutsy. Hardest jump combo made by any of the ladies today, she could easily have taken it out, so it is a treat for the fans for sure (kinda like when they guys do quads in theirs). And she's been skating beautifully at these shows, I'm glad she is using Black Swan because, for that costume alone, it deserves the spotlight. Her actual EX number has a song that is super hard to skate to, so she is always pushing the envelope and I really like that.
I agree that the tights over the boots gives an elongated effect to her body (and anyone else's too probably) but looking at pictures like this
https://www.instagram.com/p/Bh1lDJXDHXA/?taken-by=teamzagitova with the fans in Korea you can see that her frame is basically the same as it was at Worlds.
BTW I loved that little flower tiara, makes her look like a fairy. That would be a cool think to add to costume for a show.
Edited to add - one of the guys who took a picture with her there said the following in his instastory over their pic: "the guard tried to block the fans away from her but she said no it's ok and walked to me with an adorable smile, how kind and humble she is". That's his insta
https://www.instagram.com/patrick_nnn/
Edited again to add another comment from her fan Patrick_nnn that got to meet her in Korea: "Not olny she is so cute, she also was really kind to her fans!! She tried to give her signature to all the fans waiting her outside and took pictures with them! I was really touched with her personality as well"