well, this is a beast of a piece so congratulations on tackling it.
I feel that the opening should be so, so delicate, like the first few snowflakes that fall before you even say that it’s snowing. I would make this a even higher priority than voicing until the 2-handed tremolos begin. This could be applied in a few other places and will make the very bold and magnificent parts even more so in contrast to the delicateness of the gentle sections. That is the chaotic beauty of a storm, right?

As you are aware there are a few things that could be patched up but such is the nature of playing a piece that requires you to constantly be jumping around the piano like crazy. Again congratulations on doing this one (I’ve never dared attempt it) and I enjoyed your performance