Well, I have been on the Internet for a long enough time to know that Mikasa has been mocked by people over the course of SnK for her "obsession". It's nothing invented during this contest. As shallow as it may fall for you, it still is related to her personality directly, and can be debated upon within such.
If you want to see the real pitchfork, it's against Holo and her animal features, which is by no means related to her personality whatsoever.
I guess some people here are really optimistic, arguing with "She has a tail, eww", and expecting us Holo fans to be reasonable in return (Even though this obsession wasn't specifically fabricated for this contest; actually, you can just google "Mikasa obsessed" and see people discussing this, anyway).
Not fair comparing "cuteness" when one universe is made of pure suffering while the other isn't, of course mikasa wont act cute all the time, they are fucking dying there's no time for that. Eren doesn't revolve in all of this, in fact, eren is what all the people going against mikasa bring. Eren this eren that, the people voting for mikasa had tried to make it about her, yet people still bring eren back to the discussion.
I'm not comparing their cuteness. By the way, cuteness isn't the same as fluffiness. Characters can be cute in serious settings, as well. But that's another point.
I only brought that "shows cuteness once" part up, because I have run into that multiple times by now in pro-Mikasa posts. So, if anything, it has been Mikasa fans desperately trying to say "Oh look, she can be cute, too", not me.
And personally, my emphasis regarding Holo has never been on her cuteness, despite that being an obvious aspect. It's the wisdom she has, along with her playful personality that makes her a winner in my eyes.