When exporting a character with merged texture sets, it is always Diff, Norm, and Spec. It'd be nice to have a roughness/metallic choice instead, for working with PBR-textures.
-- I found out the AO, Metallic, and Roughness can be found in the "texture" folder if you go into the hierachy, while the Diffuse, Normal and Spec can be found in the "CharacterName"-folder. It would be nice to have all the maps in both places.