This is a little worrying.
Clearly those kind of latency figures are not going to be workable, which leaves us back with the audio dropout issue, which for me personally is also unworkable. Turning off AG2 for VE Pro is not really a fix - for bigger sessions I saw CPU overloads which I did not have with Cubase 7.x / Nuendo 6.x.
For now staying with older versions of Cubase and Nuendo is fine (this is where I've ended up), but can only really be an interim solution. Unless VSL are now drawing a line and saying that VE Pro is no longer fully supported in current iterations of Cubendo, I can't help feeling that the onous to find a way forward lies on this side of the fence. Certainly there's no public sign of Steinberg being willing to update it's PDC implementation for the sake of 1 plugin, much as we might wish they would.
It would be extremely sad if Steinberg DAW users no longer enjoyed full compatibility with VE Pro, because the combination is exceptionally powerful. Reading between the lines though, it seems the issue is not going to be resolved any time soon, and judging by the fairly low numbers of contributors to this thread, I can only assume there are relatively few users affected. That being the case, I don't see it getting a lot of attention in the near future.
It looks like Nuendo 6.5 isn't going to be uninstalled any time soon, but here's hoping.