Forget the rumors or speculation from folks that have never stayed on property.
We have been staying at the DLH (really miss the Bungalow's!) for almost 20 years and quite regularly since the purchase (and upgrading and renaming) of the PPH and the building of the GCH.
We have NEVER had an issue with "pool swapping" at any of the three Disney hotels. In fact, when they first opened the "Resort", they promoted the fact!
During a recent stay, we enjoyed both the PPH and the DLH pools a few times.