As for the possibility of a current player losing his/her sight/hearing, if it were me I know for sure that I would continue to play. Mostly because I will not let anything, or body, tell me that I can't do something. Sure it would be hard but I say that it would still be worth it.
As for any card game, if they had a player that wanted to play, but needed accomadations, the company if based in the USA, at all, would be forced into making sometime of accomadation. otherwise, they could be sued and put out of business, due to ADA.
Just because a player is deaf, doesn't mean that they would need a huge change in the game to play. Even at worlds this is easly fixed with a thing called: a translater. Playing a Deaf person is just like playing a person that speaks a different language, Japanese, Spanish, French...
I really hope that ALL players would have the same mindset, and encourage all types of people to play the game that we all love. I also hope that because of this topic a player that has a "disability" (I really can't stand that word) makes it either into Nats or Worlds, if not this year then why not next.
~Windjet~