I was a hardcore gamer before I lost my vision, and anything that would make it easier to make games accessible is very interesting to me. I personally have added braille to 3 full Cards Against Humanity sets including all expansions using a brailler and KNFB Reader to read the cards. I've since switched to SeeingAI since it's much faster.
I've also added braille to my set of Dominion, and in the same spirit of your app, I hand-coded an accessible website that I use with VoiceOver and my earbuds when playing with friends. The Dominion cards have braille codes and costs on them, and the braille codes, costs, explanations, and flavor text are all listed on my site. I have the basic sets and decks on individual pages using Heading navigation to jump between the cards, plus built a Deck Chooser where you can choose your own Dominion decks when making your own sets. If you are interested in checking that out,
$1 Having something that could interact with an online database of cards or quickly read cards, dice, tiles, Catan roads and cost chips would be amazing.
Heading to all of those conferences would be a great idea, and you may get the most bang for your buck at NFB. It's pretty much the largest and most diverse gathering of blind folk here in the US.