This is highly relevant to my interests You know how much I love your OoT mixes!
This one sounds like it could use some light percussion, maybe in the form of hand drums. It's very interesting though, I think a bit more humanization on the bells would add to the realism and lifelike nature of the song. The violin sample, though... absolutely gorgeous! I don't know where/how you got such good samples, but I want them!
If you're going for the feel of the Ice Cavern, some blowing wind effects, or maybe some panned windchimes, would help recreate the experience of going through the cavern in the actual game. I feel like this WIP is just begging for a sampled sound that the ice statue monsters made when they shot their icy breath at you, or something similar to that.
Best of luck with the project, it's high up on my anticipation list!