Steve, I share your experience:
A customer doing a 10 upgrade reported that both the default 10.x agent and the addon no longer produce webservices. Now the wrinkle for them was that they were using REST and CXF, but the CXF version was CG supported.
I contacted Andreas Reiss who owned the addon, but he was too slammed to review the autoprobe logs to see what had broken.
It's one of the fieldpacks that TS won't support yet, too.