I was just quoting the (ex-)maintainer of the systemd, from his e-mails from the CTTE discussion.
Without source or citation. I think your representation of what was said is rather biased.
Debian feedback would be submitted to mainline - but if it is rejected, he wouldn't even carry a custom Debian patch for it, because he doesn't want to deviate from the mainline. And he, as the maintainer of the systemd, would not consider it a bug. As such somebody else would have to fix somewhere else.
If it isn't a bug, why patch it? Sure, some people have tried to drop some turd patches into systemd, eg. ripping out security features in order to support some obscure glibc variant. The right thing of course is to patch the glibc variant to support the proper security functions, not patching systemd.
No package maintainer wants to support non-trivial, non-mainline patches without very good reasons. The whole point of open source software, that as many people as possible can share and enjoy improvements, so patches should go upstream as fast as possible. Maintaining non-trivial, non-upstream patches can also be a real problem when backporting security fixes, and may introduce patch specific bugs too.
If you are willing to grep through the 1K emails - you would definitely find that being repeated several time.
I have actually read most of them at the time, and I still think you are misrepresenting the systemd maintainers.
It's obviously not Debian specific.
It is very obviously a distro specific part of systemd: Debian was added to the list where Fedora and Arch were already present.
Huh? The main point is that systemd mainline accepts Debian (and distro) specific patches if it is unavoidable. Despite the many claims to the contrary, the systemd developers do care about feedback and have many different distro developers with commit access. If you got a good user case, chances are good that a distro specific patch will be accepted. And having the patch going into the upstream repo is much better than carrying it as a separate distro patch.
In short, Debian developers where taking part in creating systemd long before Debian discussed making systemd the default init system. So they knew what they where doing when selecting systemd over Upstart (the CLA was enough to discount it), and the latest GR have confirmed that the vast majority of Debian developers firmly backs systemd as the default init-system.