Yes, indeeed. Fuzzy skin has lot of uses, especially for objects to be held in hand. Fuzzy skin is almost only reason I use Cura sometimes, but the option to select only "outer skin" would be needed, Cura places it everywhere...

One voice for .3MF support too, it seems to gain more and more support all the time, also free alternative slicers seem to support it already (Slic3r and Cura).