I think they really dropped the ball on this splash art. Her face and stance look awkward. And the backround is unfinished
http://i.imgur.com/FHNUhjN.png
Also, something about her skin tone in the base bothers me. It feels off. Ive noticed that riot has been making her paler over the years, but she seems sick in this particular skin.
Look at her most recent skin
http://i.imgur.com/M7pTgix.jpg
She's definitely paler than her older splash arts, but she looks healthy.
Versus this
http://i.imgur.com/FHNUhjN.png
She looks drained of color
Irelia is all about balance, precision, totally gnarly surfing, and equilibrium. Yet everything about her base splash art is the exact opposite.