Issue:
The potentiometers i have seen so far on TIG finger controls are bulky and fragile.
It adds additional weight and volume to the torch and cable. Sustaining ANY static weight during welding is tiring.

I really would like to see something like a push-button up/down control. That can be realized really small. Like a left-right momentary rocker switch, where pressing right side turns amperage up and left side vise versa.
Pressing the center of the rocker activates both switches and starts the arc. I was looking into that Intersil X9313 chip that does pretty much all of that.
The additional benefit: It might be possible to use very light-weight headphone-style cable between torch and machine.

Knowing my work-load, I will never get that idea realized myself. \\

Well- just an idea.