Not 10000000% certain if this is a bug or not but I did want to at least mention it.
There's animations for lighting fires with the proper hand/tool that aren't being used.
Currently players light fires with their off hand instead of the hand they're holding with a torch.
If it's not a bug/oversight it'd be a really nice addition. Using the off hand looks really bizarre!
It'd be a simple fix I imagine, changing the lighting animation to "light_fire" should work in theory.
Equip a lighter/torch and light a fire.
Pause for a minute and realize you're holding the fire away from the object and magically lighting it with your fire-less hand!