As perhaps should be clarified: that's a fan page...(and notes only that she is still on the roster). That is, whatever it says is not an announcement from the artist.
(Even if she was/is leaving the company, it would be gracious for the Mariinsky to list her prize and not exactly inappropriate, and I'm glad they did. She did win as a Mariinsky artist.)
It seems to me that there is a good number of "fanzine" style responses to videos of Yulia Stepanova of late.
Having only seen videos of her dancing and in matching her performances with live performances those of the 60's,70's, 80's and even into the 90's, I would say that she needs more refinement in those very thin arms and she is not for me so far as I can see on film, some distance from becoming a complete ballerina.
Ha ha. You are perhaps the only person in the universe to criticize Stepanova's arms! To your other point, she is young still and has not yet had the opportunities she needs to develop her potential. There is a remarkable consensus that she has the potential to become as extraordinary as those great ballerinas of the past, don't you agree? As to the "fanzine" comment, I think both her photogenic quality and Mariinsky's poor treatment of her have excited some interest among those who don't usually follow ballet. I don't see anything wrong with that.