Folks at Red Hat noticed that the Linux userland architecture is not convenient for what they would like to build. So they are building systems which replace the traditional mechanisms: first DBus, then systemd, which is an umbrella of many services: init + service monitoring + containers, logging, interactive login, some networking, etc. I suppose that in 10 years a linux kernel + systemd could be a complete system, with little need for other userland.
'Doing many things, none of them well' is actually the opposite of UNIX.
There is nothing bad about it. What I find bad is forcing everyone to jump on the same bandwagon, no matter which bandwagon. If I wanted choices made for me, I'd buy a Mac.
Centrally developing many disparate pieces of software from one repository is what every BSD does so you can hardly argue that it's not "UNIX".
This is setting aside that systemd actually does all of those things better than the tools that came before. journalctl and systemd timers are fantastic. And good luck using the alternatives to manage cgroups.