yep it's true it's very easy and fast to do a warzone with worldpainter, and the result coud look pretty nice. But often very bad for the pvp because it's not flat enough. The biggest advantage to creat a warzone with voxel is the opptimitations for pvp the. The map is completly flat and around the corner or the road there are some big montains or differents shapes of terraforming for the decorations
that point is wonderfull for the french pvp communauty. The palyer love the warzones like that
I don't known if the same with the other communauty