Comment 56 for bug 1767648

Short of predicting the future, I think the best answer is that more keen Ubuntu users should test the next version of Ubuntu before its release. That way we can discuss/prioritize/fix accessibility issues before they get released to the wider world.

You can always get a test build of the next Ubuntu version here:
http://cdimages.ubuntu.com/daily-live/current/

There's a common misconception that Canonical has some big development team that will do all the development and testing but that's not true. We rely heavily on community users to help make Ubuntu possible.