Is it the same in Auditon CC?
HAve you contacted WaveArts about this?
Now that you mention it, none of my plugs are showing up in Au CC; VST or AU. I don't use it much. The mix tools in Pr are quite sophisticated enough. I mostly use Au for broadband NR, and sample level click removal.
The GUIs work fine in Pr CS6 and Au CS6. So, I assume the problem is in Pr CC, and now Au CC.