Kudos to those of us who suffer from dystonia and have persevered in their playing. I've been deterred/discouraged in my own playing from far less. I don't have much advice to offer, as others' input seems much more informed than anything I could say, but I offer my encouragement. In my journey with traditional grip, I've found patience to be important. Someone linked a Rob Brown video in this thread, and if I remember correctly, it took him well over a year to feel competent with traditional grip, and adopting a journey vs. destination mindset has been helpful for me.
Since this thread is the only active traditional grip discussion, I hope you'll humor a point about traditional vs. matched (and I don't mean to be adversarial). We all know why and how trad. grip came about, but I think to end discussion of its relevance there misses the important point that traditional grip players mainly developed the drumset as an instrument (I'm no drum historian, so I'll be happy to be corrected). If this is true, then matched grip should be considered an adaptation to playing the drumset, as it was meant to be played with the traditional grip. Thoughts?