Epoxy turns rubbery with heat. You can probably use a hot air station to soften the epoxy and remove it. Yes the pcb is also made of epoxy but probably higher temp and the copper should wick away the heat enough that the added epoxy should soften first. Worth a try if you have already written it off.
The z-mote guy talked about having potentiometer issues with his prototypes and ended up using one that was rated for like a million cycles. You could check the part number of the Hoyt one and see what it is rated for and try to find a similar one with a longer estimated life
Throttle gave me a bit of a trouble as well. I didn’t want to use hall sensor because they are hard to get it just right and the output values are sometimes jumpy which is not ideal. I turned my attention to potentiometers but again most of the products are rated for 10-20K turn lifecycles. I found 2-3 products which are just right and rated for 1KK(1million) turn lifecycle and they are incredibly steady.
FWIW the hall sensor throttle on vesc wand is terrible and imo unusable.