New splash should be Evelynn's Visual Update
Recently a Rioter stated that they are still planning to make a full update to Evelynn: http://boards.na.leagueoflegends.com/en/c/story-art/mvHRM2Lm-evelynns-new-splash-art-is-absolutely-amazing?comment=0003 and this will lead to her splash being updated again along with her lore and maybe skills etc etc.
I think we all should take a look at how overwhelming the reaction to the new splash is. Let's face It, this new splash is awesome. It looks practically the same as old Evelynn you know and love hate, but at the same time it solves all the existing problems she has. She's attractive, she actually wears some clothing, spikes on her leggings look like something she can actually use now and this art shows a lot more character. She also has this cool neck-chest armor-like thingy. And overall she looks very new and shiny while still being 100% recognizable as the same Evelynn from the League of Legends beta.
Riot, you shouldn't be missing out on this opportunity and make this splash her Visual Update. When the time comes, just remake her ingame model so it fits the new splash art - and here's your VU right there. Don't make this great work go to waste!
TL;DR New splash fixes all Evelynn's problems and it should be her VU.

route and change the splash again with the update. Still, this splash is such a huge improvement over the current one.