Before I knew about your mod, I used another mod for custom models: CPM Legacy and CPM Remake (maybe you know about them, since the names of this mod and your mod are consonant).
That mod has a very cool feature: "Physics" that you can set for the bone.
Here are examples to make it visually clear:

I searched the internet and it's called "dynamic bones".
The whole joke is that there is some kind of bone (folder) for example, this is a bone for the ear, which is a child for the bone of the head (roughly speaking, it is attached to the head), and when this function is enabled, the user can adjust several physical parameters: elasticity, stiffness, damping , friction, gravity. (to be honest, I don’t understand all of them how they work. Perhaps it can be simplified) and as a result, when moving the entire character or when turning the head, the ear bone also turns, but not just like a straight stick, but more smoothly (depending on settings)
Here is another example of how it looks, but from Blender:

This is all somewhat reminiscent of how a cloak behaves, but in a more advanced version.
Perhaps you could add something similar to the mod. This would be really very useful and cool for model makers. Especially for those who make a tail for their character.