User blog comment:RoznosicielCiast/Why Sejuani is getting reworked?/@comment-5514182-20130215024404

She was an underplayed champion who also didn't appear visualy correct (half-naked ice warrior, what?). She had a visual update planned, and I guess they decided to tweak her to see if that would get more people to pick her up.

She's currently viable, they're just buffing her a bit, and I think she'll also use the Icy debuff, like Ashe and Anivia.