Please, add separate slider for ambient sounds. I just played WOTH and wondered why the nature in that game is so immersive and then I realized, it's because in COTW ambient sounds are set very low, so a lot of times it's difficult to hear all the ambient birds, wind sound, etc., and in WOTH you can hear the nature very clearly.
I tried turning the volume to max in COTW and it's so much better when you can really hear all the different sounds of the nature and it feels more immersive. The problem is, all the other sounds like walking throught the bush, inventory, gun sounds and so on end up being too loud.
So I propose separate slider for ambient sounds. And SFX slider for the rest.