I remember users frothing at the mouth for pulseaudio before it was included. Let me assure you if it had not been put in Ubuntu by now the complaints about it being missing and Ubuntu "not keeping up with the times" would be at a fever pitch. I am not judging either way, PA works quite well for me but evidently others are not so lucky. But the reality is regardless of its state there is no way users would have sat quietly for this long waiting for PA to be included.
1) "Relase when finished" is an impossibility. There will always be problems with different areas of a distro. Programs not ready, hardware not supported, etc... It is a moving target, a release is a snapshot of that target.
2) "break the 6 month cycle" is silly. If you want Ubuntu without the release cycle we already have that. It is called Debian. One of the main purposes of Ubuntu was to make a release based on Debian that comes out in a predictable schedule. Do away with that and you might as well use the Debian flavor of choice. (As a user of both distros they each have their benefits.)
3) "like Opensuse or Debian"... Use opensuse or Debian then... Go ahead, we won't mind... All distros have their good points and bad. End users should choose a distro that concentrates on the good points they consider important. If Opensuse works for you go with it, grow the community. If Debian/Gentoo/Slackware/Fedora works for you then great. Do not try and change one distro to meet the priorities of another though, just go with what works for you. Personally I despise Opensuse's desktop and layout, it simply does not work for me. I loved Slackware but it is too time consuming to maintain on the number of systems I have. You get the idea. (K)Ubuntu is not perfect but the choices they make are at this time the best fit for my philosophy.