If the solution to censorship is to constantly switch to new hosts, it would be even easier to do this via a VPN (which wouldn't require you to rebuild your social graph at all, unlike a federated endpoint switch).
If the more straightforward solution (VPN) isn't a panacea for censorship, then federation isn't either.
If the more straightforward solution (VPN) isn't a panacea for censorship, then federation isn't either.