So what kind of fix do we need?
Outside of that was found in tdebase, XDG_SESSION_COOKIE is used in kpowersave and tdepowersave (will be fixed after commit patch from bug 1597). This is good news - on the ConsoleKit no more dependent - only TDM. In other words, it should be enough to add support for SystemD session into TDM. I will try to assess how difficult this task is...
While systemd support is necessary, is this an R14.0.0 priority?
Darrell