@Spiraling wyvern, I agree that access changes don't necessarily mean ruining the interface for sighted users, but people often suspect it would, which is exactly why it's good to talk to developers who are still working on games or can make changes, it's also good to know, when proposing a change for access what is, or is not easily doable coding wise.
All of this however is fairly basic informational stuff, and unfortunately it's not out there.
I have a nasty feeling judging by the reactions I saw to smugglers and comments like "Well it doesn't even have prpper graphics, why should we pay for a text game" that at least some steam users wouldn't exactly be friendly to access changes, though as you said, the almighty prophet margin probably still isn't enough indeed I myself don't see large companies doing access in the future at all failing some sort of massive legal change, I personally believe all the access will be from friendly, indi developers who can be talked to directly just like with The wastes, adventure to Fate, A dark room, core exiles etc.
I'm afraid I disagree on you putting together the issues of people being reluctant to use the mouse in a game like Swamp and not wanting to as you put it "conquer a hard level in a mainstream game" sinse these two things are essentially different.
Swamp is a hard game, and using the mouse is something people aren't comfortable with, however all the necessary information a blind person needs to play swamp is there, it's just a matter of using it. Swamp puts everyone on an equal playing field irrispective of sight level, it's just that the game being played on that field is a particularly tough one.
If however a sighted person can get through mario brothers level 1 in under five minutes, and it takes a blind person two hours of memorization to achieve the same challenge, then the playing field is not! equal. The blind person is missing vital and important information about the game, indeed is missing at a rough guess %70 of the information given to a sighted player. This is not to say "don't do it" just that for many people that level of inequity is too far.
I will confess myself, having played with low vision, if I cannot at least discern where my character and the basic elements such as my opponent in a beatemup or the layout of ledges on a level are, I find the experience of just playing and memorizing with sound missing all that information more frustrating than rewarding.
As I said, this is a very personal thing and I admire people with that level of patience, but I don't think it's fare to condemn people for not wanting to play an unequal game with half the peaces missing.
I also am not convinced even if! every single blind person who played games got together and sgined a steam petition you'd have enough money to convince the fat cats. hell, at the moment in Britain there has been a massive campaign to get talking announcements made manditory on public busses. As you imagine, far more blind people of far more ages ride the bus than play computer games, yet has the government taken any notice? have they buggery, and unlike a business the government is supposed! to serve the people, not just the god of the prophet margin.
Unless social perceptions improve and legal changes are made, I don't see the fat cats being convinced of access any time soon, concentrate on the indi developers, and the decent people you can! speak to and what changes you can make, the developers who actually will give half a crap about access in their games.
Really after all the time I've been on this site, nearly ten years, I have not seen the mainstream situation improve one iota, and conversations like this about nintendo, capcom, the Xbox, ps4, blizard, square, and pretty much any mainstream company have been had for years.
It's not made a haypennyworth of difference. On the other hand, the number of accessible games has skyrocketed, especially with the release of the Iphone. muds, browser games, not to mention audiogames created independently of the blind gaming community such as grail to the thief and pappasangre, and then of course we get the dedicated devs who show up out of the blue like Aprone.
It's like one of my favourite eastern proverbs, from the tibetan folk tail of the goblin rat, "For peace do not look to large places, keep to small"
or to put it more crudely, the bigger the ant hill, the more shit.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)