I’v been using the pose library for sometime, and I feel that bone location data should not be recorded/stored by default. For a pose only the RotScale data is necessary(Particularly for body poses). I know of one work-around, where one has to deselect the hip bone and root bone. This leaves out the RotScale data for the hip bone and would be nice to have another method if any . If we could reduce the deselection bit of it, I think working with the pose library would be a bit easier.
Edit: For reference, I mean bones snap to world origin when making a change in pose during blocking/animation.