We never pool hop, just seems like a hassle to me. I also don't choose my resort by the pool it has. We do use the pools where ever we stay but any resort's pool is fine. We wouldn't care if it were removed as a perk but I think WDW would get better results by stopping locals and others from pool hopping and leaving the DVCers alone.
As far as the BWV people being the largest PH group so far I would think that's because SAB (the pool of all pools) is so easy to hop over to from BW.