I never use bar soap. I also find it to be extremely wasteful relative to liquid soap. The Fairmont in the North End in Boston used to recycle the leftover soap, collecting them and sending them to be re-formulated and donated. Only place that I've ever heard of anything so thoughtful.
I also hope they don't refill bottles. The "permanent dispensers" like at a Four Points stink - but I don't mind, for example, CYs where they replace the ENTIRE BOTTLE and pump when it runs out. Housekeeping just has new full bottles on their cart.
I also think they should rollout a sanitizing routine for the parts of the pumps that come into contact with hands. Just make it clear that every Housekeeper MUST sterilize the pumps daily. If that occurred, would be very appropriate for the premium and luxury Bonvoy brands.