Your feet are too little! I wear a sz 14, and the GG brake (01), is the best I've used. I also have nerve damage in my r. leg and foot which prevents me from being able to finesse the rear brake. GGs do have a long brake lever, which helps me. I run my lever as low as I can get it without it bottoming out before it locks up.I also like as much slack before engagement as I can get.
My foot is always over the lever, and on bumps I am slightly dragging it at times. My r. foot kind of "flops" up and down a bit which I can't help. After about an hrs. riding, my foot is numb and my calf so weak I have to "rock" my foot forward to hit the brake. When that happens, all I can do is either do full lock, or not at all. I added a heavier spring to the rear brake to prevent some of the accidental dragging I do, and I've found that for whatever design reason the GG rear brake is a bit harder to push than most others, especially KTM which has way too touchy rear brakes for me. On KTMs I have to use a heavier spring, and also add another medium wt spring to help with the dragging problem.
I have recently moved from 4sts to 2sts after 15 years. I went to 4sts due to my brake dragging problem so I could use engine braking, but
on the GG, I can still modulate the r. brake enough to ride smoothly. Also having a 2st that absolutely won't stall no matter what mistakes I make with by brake foot helps. (I have a 12oz flywheel wt as well, 01 250 XC). I change my rear brake fluid every 4 rides/races with Motul 600 which fluid which is almost impossible to boil over. Even Motul wears out after a few hours with my heavy brake foot, but most riders can go a full year without changing it. I run the non-sintered metal (carbon), brake pads most of the time which wear faster but don't overheat as much. In deep mud I switch to full sintered metal because the others won't even last one event in deep mud. I have also been using a Trials tire, which seems to lock up more slowly, or takes more pedal effort to lock up. It's a little harder to brake slide but more predictable on straight up and down braking. I find that a fresh rear tire is more important when I ride a 2st. The front tire can be worn, but the snappy power and lack of braking traction on a 2 st due to the light weight necessitates a good rear tire.
I can go from a 2 to a 4st much easier than the other way I always feel like I'm braking too early when I make the transition to a 2st, takes me a couple of rides to "relearn" my braking points.
If you can't get used to the long brake pedal, just take it off and have any machine shop shorten it.
I have gotten too long winded about my specific needs, but I guess the point is that you can probably work with bike setup and figure out what you need, and don't be afraid to experiment. If you have the pedal shortened and don't like it, just buy another stocker?