User blog comment:RoznosicielCiast/Why Sejuani is getting reworked?/@comment-67.149.107.203-20130214171902

Her early game isn't good, as I'm sure you know if you're asking this question. She doesn't really fit most team comps (which is fine for solo q, but some people want synergy on their premades, it's not just about the pros). She can also be countered pretty hard.

That said, every I just said applies way more to Fiora. Her ult, while fun, is easily countered and has some really weird glitches going on...