Why should you expect they include systemd-utils? I'm sure many of those utilities only work with systemd, so why should they package a mostly-broken package?
And if they adopt the current debian way (which by the way could now be considered obsolete because udev already changed how things should be done), then you have different ways of doing things on different distros. So what are the wins of using a new udev?
Anyway, I'm not talking of Ubuntu per si to do this. I'm asking of a way for users to do this in a compatible way.
What assurance can anyone have of any way they choose udev will not change it's mind again, now expecting people to have this things on a xml file on /etc/udev/extra-devices.xml and automatically removing any device not listed there?
I'm not a big fan of the kernel internal unstable API, but I can understand it's good points and accept it as a choice made by them. This, on the other hand, is just gratuitous incompatible changes into the user-space API without any good points I can see (other than breaking because it's "prettier" this way).
This is hardly the way into unifying the plumbing on Linux systems...