Wow Peter, this is superb. I'm not blowing smoke up your ass just because you're my friend, it really is good.
First, I think anyone wanting to become a better composer should take notes listening to this. You were able to stretch material from a simple theme and develop it across 7 minutes of music. It's very through composed. Your theme is very catchy too, I really like the constantly changing intervals with the wide leaps. You also do a great job with textures too; there's lot of variety with tutti and sparse sections. Maybe one thing you could think about for the future would be to give solo instruments a little time as well. Might sound cool if for example violin group lines played a majority of the phrases, but giving a solo violin a melody, especially in lighter textures, to vary up the timbre of such a homogenous ensemble.
I really liked the pizzicato rhythmic spots, it gave me video game OST vibes. In fact, the entire piece sounded like it could have been in a game soundtrack. You're game influences are strong lol, which I think is a good thing. Even if people who listen to your music don't have much classical music listening experience, they perhaps would be subconsciously drawn to your music, bringing up some nostalgic memory of some game they loved.
You don't let any one instrument be more important than the others. You cleverly give the main theme to many of the instruments, really giving variety to the sound, as well as making all the parts interesting. I really enjoy the contrabass, I think it fits into a large string ensemble well. I'm on the team of write for whatever ensemble you want, unless you're writing for a specific ensemble. You could always amend the music written to fit something specific that may come up (and I hope it does!), but go with what you want the music to sound like first. Most of us will only have the sound samples as our voice for most of our pieces, so make it sound like you want.
Speaking of which, the only thing I didn't like was the mixing. I suppose it's the default way musescore arranges the panning, but I hated that the 1st violins were all the way to the left, and the bass was all the way right. If it gives you the option, put the bass down the center and then spread out the other instruments. I know you heard my piece "A Dream's End", and that was a mistake I made in hindsight with the mixing. I was going for "if you were listening live", but it doesn't come across well, especially with headphones. I hope there's an option for that in musescore, but if not, it's not that big of a deal since the sound sample changes they've recently made are a very LARGE improvement.
I'm curious on the key signature decision. I have no frame of reference since I've only ever written two bi-tonal pieces, but why A Major? Sure it's "in the middle" for the two keys you used, but I would have thought just not using a key signature would be a better option. I'm interested to hear your thoughts on this.
I hear Bartok influence, but don't hear Bartok in this. This was completely your own music.
I know this isn't exactly a "new" piece from you (not sure how much of it was written in the DAW some time ago), but this was a treat to hear, and it made Christmas for me. You know I'm a huge fan of your work, and an even bigger fan of your character, so thanks so much for posting this piece. I hope the changes made to musescore continue to better represent your musical ideas, and inspire you more to compose more often. I know you're busy with rl stuff, but I'm always excited to see the newest PeterthePapercomPoser piece. Merry Christmas, and congrats on such a wonderfully crafted piece of music!