I strongly doubt that a 'systemd like' in FreeBSD would have quite the same issues. I still wouldn't see the point of fancier startup/shutdown dependencies or process supervision because I run FreeBSD on hardware that doesn't change while running with daemons that don't crash; but I imagine it wouldn't include: a DNS resolver, but broken; an ntp client, but broken; a login daemon, but broken; etc. I also would expect the rc.d scripts to be kept, because the service scripts are simple (rc.subr is a bit complex).
As you can see, one doesn't actually need to keep all of the rc.d scripts. I manage well without any of them, in fact, including running desktop GUIs on PC-BSD under service management.
logind is a much misunderstood part of systemd. It is somewhat difficult to state that it is "broken", given that there really isn't a spec for it to be compared against for conformance, and it is largely the only implementation in existence. It's what Ian Sutton reported as being the most difficult part of SystemBSD, as noted in https://news.ycombinator.com/item?id=10176275 and as I said beforehand in http://jdebp.eu./FGA/debian-systemd-packaging-hoo-hah.html#s...
There are a few things about it that can be stated to be wrong, though, inasmuch as they interfere with the operation of the services that service management is supposed to be managing. The limits on the number of threads that database services and suchlike can run are a largely unreported problem, for more on which see https://news.ycombinator.com/item?id=11675129
Personally, for resolving proxy DNS service and content DNS service I use modified versions of Bernstein's dnscache and tinydns. The modification involves my own well-known, and years-old, patches; and making dnscache and tinydns capable of receiving their listening sockets as already-open file descriptors, via the LISTEN_FDS protocol, making it possible to integrate them with UCSPI-style tools that open the sockets for them.
Given that bluetooth is complex, I'm not surprised it has a complex rc.d script. In any case, I feel these scripts are less complex than the equivalent scripts in Debian init.d; removing a lot of the argument for a 'simplification'. For example inetd on my FreeBSD box is a 20 line rc file, and openbsd-inetd is an 85 line init.d file (much of which is using start-stop-daemon for common cases). I don't have bluetooth installed on Debian to compare.
