Christian Rath-Ulrich, Willi Wehmeier and Patrick Schriner and a few others (sorry for not namedropping everybody, but the first two are on a roll recently) are on a crusade to address many areas where accessibility is not yet factored in completely, for example:
https://forge.typo3.org/issues/102472
https://forge.typo3.org/issues/102470
https://forge.typo3.org/issues/102543
It would help very much if you could cross-reference their issues, I believe the filelist has also already been mentioned. It would help to create distinct issues focussing on very exact cases instead, so mention every specific icon instead of being broad. That also raises chances for implementation :-)
Maybe you could join the effort and help testing, reviewing or even submitting patches?
(Patrick, Christian, Willi - hope it was ok to add you as a watcher. Slap me on the back if I shall never do that again :D )