Upstart was unnecessary in Ubuntu. Systemd is not necessary in Fedora or Debian.
There are other ways to get fast boots, without create another monolithic do-everything daemon with spaghetti dependencies.
Basic software engineering principles (and Unix principles), should tell you that do-everything daemons, like upstart, systemd, hald are bad ideas.
With such complex, unmodular core Linux systems, Linux based OS's will grow increasingly more unstable and insecure.
Also, systemd and upstart make Linux much less suitable for embedded systems.
The choices, I guess, are:
Fork the pre-systemd Debian.
Start fresh, perhaps even starting with the simple event based init system from the most popular Linux distribution in the world ... Android.