I would like to second the request to publish the audit, and for a shepherd on the Discourse team to begin to think about how accessibility changes could be incorporated.
I’m one of the admins on a project that wound up with two forums (OpenWrt/LEDE - long story, not worth repeating here.) One forum uses punBB, the other Discourse.
There is so much to like in Discourse, that it’s hard not to standardize on it. But at least one of our significant contributors finds Discourse very difficult to use with his screen reader, and he is quite reluctant to use it.
A year ago when we set up Discourse, I told him that a review of this forum made it sound as if accessibility changes might be in flight. It would be wonderful if 2018 would be the year for it. Thanks for listening.