I couldn't import the DAE into SP, however, if I import it into Blender, export DAE without the armature, it loads into SP just fine. One point though, the materials are split, so you would end up with several maps, whereas you've put everything into 1 map, so personally, I would have 1 material with vertex colours splitting the material for use in SP in masking.
Here's an example of that, I've created one material, with vertex colours separating the previously assigned materials. Used this as an ID mask in SP with color selection masks.
Attached is the DAE i exported from Blender with this setup.