Kassadin's sword still bifurcates his hand
http://i.imgur.com/vPYhgqB.png
Happens on all of Kassadin's skins including base model. The sword should be rotated by 90 degrees vertically as seen in his splash art (sword above hand rather than through it).
http://ddragon.leagueoflegends.com/cdn/img/champion/splash/Kassadin_0.jpg