Thanks, I very much enjoyed this. It's the first time I've heard this particular work, but I think you've captured Ives's character very well, both the pensive and the raucous sides, and play with a lot of energy. There's a couple of things I'd like to comment on, but bear in mind that I don't know the work and don't have a score to look at, so take all of this with a grain (or more) of salt...
First, in a complex and unfamiliar work like this, you need to guide the listener--let us know exactly what we're supposed to be listening to. Mostly you do an excellent job of this. But there are two passages--around 0:55 and 3:20--where I think I'd like the left hand to dominate, just so I've got something more to hang on to.
Second, I wonder if the episode from around 2:30 to 3:10 would be more effective if you aimed for a sort of icy calm, almost expressionless, something that creates an even more dramatic contrast with what comes before and afterwards.
Third, at 1:37 and similar passages later, where things are becoming frenzied, I'd like to hear the left hand driving the crescendo--make that bass really growl! (Actually, it's possible that you did that but the bass didn't come through on the recording.)
But really, I'm just poking at things to get a conversation going. Thanks for posting this. I've accompanied a few of the Ives songs, but not got around to learning any solo works yet. Things like this might help to motivate me