Why bother? I mean, what is there really to gain?
It's not like we're talking about the troublesome and unreliable Thrustmaster HOTAS system.
I retired my gameport versions of the F-16 FS, Pro Throttle, and Pro Pedals, after 8+ years of flawless service, then switched to the USB versions of the same sticks and have had another 4 years of trouble-free use since.
Replacement Pots are cheaply and easily available direct from CH, or contact them for quick and reliable factory repairs or exchange under warranty.
Opening the case to attempt to swap out pots for hall sensors will void the warranty at best, and may end up not providing any measurable or noticable improvement in performance...and certainly won't improve anyones flying abilities.
Good Luck!
CptA