In it's current state,
systemd-homed is a jumbled mess. When I saw Lennart's original talk on it, I was shocked that he released it in the state it was in. Especially considering it can't even handle something as simple as key-based SSH auth. If you want an encrypted homedir,
ecryptfs has a much longer (and better) track record and is on my list of things to look at for the next version of the installer.