No one has to maintain Unity 2D as it would eb in Precise repos until April
2017. What one has to od is download it and its dependencies and keep them in
his/her hard disk. Unity 2D was killed of in QQ and RR for a reason. If you'd
like, you'd find the thoughts here;
http://ubuntuforums.org/showthread.php?t=2095113
Unity 2D doesn't need any futher maintainence, it'd live as it is, whatever
Ayatana and Ubuntu devs would do to it. You don't need to support it, but
justdownload it and keep it.
Let's see how Trisquel 5.5 would work with a standalone Dash, but without
Unity.