The current release process can imply some breakage and I don't think that is news to anyone. I assumed since you are pointing out a problem, you would have thought about some solutions or atleast interested in thinking about some and I wanted to hear those. That isn't orthogonal at all from my perspective. If you are not interested in that and this is just merely commentary, thats alright too.
You are guessing that pre-release breakage is turning off people from testing and that might well be the case but going a little bit further, have you thought about why there is pre-release breakage and what can be done to break out of that cycle? There is always a shortage of resources in people in quality assurance for distributions with a short release cycle. For instance, AutoQA could prevent a number of breakages and they have been repeatedly asking for help in writing tests. Certainly a resource shortage there.