Congratulations on all the hard work you've done. I wouldn't normally touch a madden game with a barge-pole given that I don't know the first thing about American Football and that would normally mean the game is of no interest to me.
However, I'll look at picking this up just to see how the accessibility works in practice and publish my own information on it. If you like me to help test any aspect of this in advance, contact me privately and if it's possible, I'm sure we can arrange something.
Keep up the good work and look forward to seeing the results in action. Hopefully non-sports games (or at least games that don't work primarily to the advantage of a particular demographic, such as US citizens) will be the next field for access improvements (Star Wars BattleFront 2, Titanfall2, etc etc).
Regardless though, glad all your work is paying off.
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