We certainly haven't forgotten about this issue. We will make this a focus of an upcoming sprint.
Richard: your comment suggests that Moodle somehow became less accessible with 2.3. This is not the case. As we work through this and other accessibility issues, Moodle is only improving, so in that sense, 2.3 would be more accessible than previous versions. If you can identify issues in this META issue, or other issues, that are related to the legal requirements in your part of the world, please comment and vote on issues to indicate that. If you think the priority of an issue is set incorrectly, please contact me directly.
As always, we welcome solutions to issues. These can be in the form of patches or whatever you can create. That will definitely make such bugs/improvements move along faster.