Oh! Haha I was replying above and didn't even see you were already mentioning my Blender plugin. So my plugin basically converts the rigify rig into a Game Dev skeleton. It's not a Godot thing, it's a blender thing. But it makes the rigify rig retarget and IK compatible for Godot, Unreal and Unity. So you get a Game Dev standard skeleton, but with all the benefits of the rigify style control rig in blender.
It'd probably help out a lot of your users if you used it on your models. I know this sounds like self-advertising, and that's lame, but seriously a standard Game Dev skeleton, and you're already using rigify for your rig, so it'd be very minimal difference for you, but it become a lot more compatible for anybody else using the different engines.