P3DO has a Pattern Renamer, in the Tools menu, which lets you add prefixes or suffixes to all the files in a Pose folder (so you could add Dgr, Sw, 2HSw to your various Schlabber folders before consolidating them). As long as you have updated you can combine or remove any of the Pose!V3 folders - all references should now be to the Libraries!DAZ folder (you may need to edit third party INJ files made pre-update, either by hand or by temporarily restoring the old structure, loading the pose, then saving as a CR2 and running it through InjectionPoseBuilder to get an INJ PZ2 which isn't fussy about the Pose library structure).