The legend returns! And with new music in his innovative harmonic language too.
I don't think you need to think of this a "settling" for something lesser, I found it to be quite fascinating and enjoyable. The harmonic language is unconventional, but it is held together by clear motives and good thematic development. My favorite part was the climax at m.42 that leads back to the "bell tones" at m.47.
Out of curiosity, is this the mode you used? If I'm not mistaken it looks like this was the mode used from the beginning up to m.22, where you started using this mode transposed down half a step. I noticed several other transpositions throughout the piece as well.
The neat thing about these kinds of modes is they are symmetrical about the tritone, so you can transpose a passage up/down by a tritone while still being in the same mode - a trick I noticed you cleverly used throughout the piece. (m.8 & 9 for example)
It looks like you used a ternary ABA form, with a climax around m.42 at the end of the second theme, which I thought was an effective way to lead back into the first theme. I really liked the contrast between the two themes. The only thing that felt a little unbalanced to me was m.8-11 (and m.53-56 in the recap.) - I felt like these four bars need a complementary four bar phrase after them before you get into the rit. at m.12. To me this rit. came a little to soon after the fermata at m.7, and I think a complementary phrase that mimics m.8-11 with slight variation would solidify this theme a little better. This is of course only a suggestion, feel free to ignore if you disagree.
I also noticed at m.48 and m.50 it looks like you have a Cb and B natural sounded simultaneously, is the B natural supposed to be a B flat to match the beginning?
Let me ask you this: since these modes are symmetric, how do you view the functional role of each scale degree? Do you see each degree in the mode as having its own independent function, or do you see degrees and their symmetrical counterparts as having complementary (or even the same) functional role. For example, in the mode I posted above, do you see the E natural and B flat having distinct, independent roles, or do they have some kind of similarity or relationship due to the symmetrical nature of the mode? This might send us down a rabbit hole, but I'm interested in your thoughts.
Thanks for sharing! It's good to see new music from you, and I look forward to the remainder of the suite.