(not really; I'd rather not introduce an alias or any sort of symbolic behaviour that would teach me to expect that systemd crap is available on a system. The less you rely on it, the better)
Seems novel. But from a security aspect, if OpenSSH has security vulnerability that allows an unauthenticated user to login, via whatever means, once you are in the system as a non-privileged user, you are now free to use the same vulnerability to get root.
Basically this exercise is like using two locks that have the same key to open them. If the same key opens them, then a weakness in one, is now a weakness in the other so why bother with two identical locks?
It has some advantages. It can be configured with simple text files and normal filesystem permissions. The sshd code is mature and has a proven record of good security. It doesn't add yet another thing to systemd that has no business being part of systemd.
Not relevant to the topic in discussion, but I like the simple site design. Someone really needs to work on the long-ass page - at least limit to five blogs on main page and add the pagination in a separate blog page. Scrolling was a weird experience.