After this update...
https://github.com/RPCS3/rpcs3/commit/dc...051a60b2d5
...the graphics issues with the hand and weapon models are finally fixed. but there are still some issues with lights shining through objects in some maps.
Campaign works, zombies works, splitscreen zombies works and splitscreen local multiplayer also works. Performance in regular modes is great (45-60fps) but unfortunately splitscreen needs higher specs than mine to get above 30fps and vertex cache has to be disabled to stop constant flickering on players and bots.
I've played the first couple of missions in the campaign and I suspect it can be completed easily enough. Actually quite enjoyable to play.
My specs
i5 6600k oc'd tp 4.5ghz
16gb RAM
GTX 970