That's an interesting option, I'm going to check this. Sadly I have no idea if any of my conversions use those bones.
The main problem is the in-esp-texturing. When useing a optional texture, for instance the monk robes.
If retextured in ck and the main nif is replaced with a nif that has another hierarchy, it use wrong texture paths and may results in clothes textures on body and such.
My walkaround would be:
to save the retextured versions as nif and use those in the esp, use more space on the harddisk, but is much more easy to handle for "drag and drop" options.

Indeed a good idea, thought myself about that. However there would be some limitations that we have to deal with if we want a simple 'drag and drop' version. In-esp-texturing, for instance, also 1st person meshes (torso), I always link to the original demonica 1st person torso.

very nice job Sir biaru! Drops down the steel and Iron armor to the very bottom of my 'to do list'.