After spending some time evaluating #Hubzilla, I've decided to stop. While it has some nice features that are lacking in Diaspora*, there are too many fiddly bits and bobs, and the UI is cluttered. I think it would be off-putting to the typical Facebook refugee.
I know it wasn't designed to be a federated social network platform per se, so it's not fair to judge it as one. However, that's all I'm interested in, so I really don't care what else it can do. I understand the developer is working on a new project that is intended to be a social network platform, and I definitely look forward to checking that out when it's ready for prime time.