Unfortunately, there's no such thing as 'Maya lite' but, perhaps, some-one will figure how Maya's rigging differs from Blender's I/O options...

Like-wise MakeHuman's oft-quirky rig, which could offer an open-source alternative to LaF/H, so another route to grow away from Daz' legacy ??

As Open3Model viewer cannot yet grok the latest FBX version(s), their rig tree shape(s) are less accessible to inspection. Are there any similar open-source utilities ?? Or rig-modding tools ?? ( Perhaps I'm not giving Google the right search parameters...)

-- Sorry, gotta go, oldest tabby cat is howling: Either she missed 'Second Breakfast' and is duly disgruntled, or she's hunted another mouse from their garden rockery redoubt and is 'Counting Coup'...