Texture uploads are overkill, imho.

I don't see how different body morphs would increase the memory footprint though, since it's just one model in memory with different transformations applied. Storing a scene graph doesn't cost that much and has to be done in case of presets too, just that with variables there are potentially more paths in it.

As for animation, i don't know how a slider system would affect them. But since they motion-captured them for one type of body but still have some presets, maybe it doesn't affect it that much?