Oh no, poor bubs
he sounds like he is doing so well even with the poop issue. He might not communicate when he needs to go but you can tell if you watch for cues. For example they usually go very quit and still, they will often look down. Then you can grab the potty !
I totally understand the sensitive thing, Leon is just the same. Sleeves, keg cuffs, gloves, socks, certain shoes, anything touching his feet, loud noises, bright lights, hit and cold !
If he is really averse to cloth I would go with the potty maybe?