At this point, I'm pretty sure that WW is already independent of Convexity. Now that WW has a VMF exporter, entities, leak file loader, I'm not sure that there is still anything you need Convexity for to use WW. The Hull Helper originally worked only with a never-publicly-released Convexity tool, but I even built an internal implementation using native PhysX/MassFX.
Is there some feature in mind that you feel is still tied to a need for Convexity?
That being said, I still wish that Convexity was not terminated, because it's wall/floor tools are very powerful design tools.