Shiz was a great guy and an even greater GFX artist, true. However that does not mean the future of Ol' West is doomed.
There are plenty of talented GFX artists on the Ol' West team and I'm sure more are to come.
Another point is that Ol' West isn't based around graphics like classic is. People play Ol' West for the unique skills, basing and events.
The content Shiz already made is still in-game, it's not like all his stuff is removed.
It's sad to see him go, though get your **** together. Ol' West will not die just because of this.