Hi Dave,
First off, congratulations on the live performances, I hope you post them somewhere.
Secondly, congratulations on writing an extended work like this, it is not easy and takes some commitment (in your case a few days😤........😃).
Although it started off very beautifully indeed, I can't decide on the first mvt (listened 3 times). Perhaps this is because there is almost too much invention in your writing/scoring - not a bad thing, but perhaps a less mercurial approach would benefit your thinking in longer forms and extended line. On the other hand, there where some lovely moments and interesting scoring so it just my own personal approach to composition that colours my judgement which is irrelevant and can be safely ignored.
EDIT... on the 3rd lsten, it did start to hang together as the ideas became a little more familiar, so perhaps I am being a little unfair here. It sounded remarkably English in places too for some reason.
The 2nd mvt. had a more continuous feel for me and was better for it. I felt it had a nice emotional arc - very beautiful in many places with a nice restraint in the harmony and scoring that didn't make it cloying. Nice to hear too that it had more quirky moments.
The 3rd is the best for me with some lovely contrasted writing and bitey (is that a word?), Poulenc/Stravinsky-ish ideas. I loved the cycle of 5ths that popped up. This mvt. worked best imo because there was a more obvious, consistent, prolonged musical thought process in play, which helped comprehension even on a first listen.
Part of the mix sounded a little out of balance to my ears, especially the percussion (timp especially) which were too far back and lacked depth - sometimes, the timbre (dynamic?) of the timp didn't feel right for the space and level I was hearing. Dynamically too, I feel you could have pushed crescendos (and dims too) more in places for more effect as it feels somewhat in the middle dynamically for most of the time. Did you programme any rubato or subtle tempo fluctuation?
OK, some reservations, but some lovely moments too. There are definitely more musical effects to be had with the programming but the piece is a very enjoyable and in places, moving one and I should imagine would be a nice experience to learn and perform. If your wife records it, I would advise re-visiting the midi to eke out as much expression as you can....the work deserves it.