Advice on Changing Pads in a Parking lot

Pistons hanging up. Only thing that would cause uneven wear. Either one side isnt applying or other side isnt releasing. Im leaning towards one side not releasing. Seen many that heat up and pads start to disenegrate.
Couple thing cause it. Hose failure,they turn into a check valve and hold pressure in caliper.
Other is the pistons are phenolic,a fiber material that wear and **** in the bore.