The photoshop script can export groups as skins which is great. One problem though is it treats ALL groups as new skins, resulting in something that doesn't make much sense:
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To get Spine to create just the root-level groups I wanted (male, female) I ungroup the nested groups in photoshop before exporting, but that creates a big problem: photoshop uses groups for preserving draw order. By ungrouping I lose all the draw order of every image and the asset becomes a mess that would take hours and hours to correct.
My suggestion is to have an option in the photoshop spine script for "only use root groups as skins" or similar.