Thanks, glad you enjoyed! 😃
I took some violin lessons, but my comments also derive many times from feedback from string players that have played my music. I don't think the col legno's a big issue here (but I could be wrong!). The example of this technique in most books is from the finale of Berlioz's Symphonie Fantastique, which has literally this same figure in 6/8 and a similar tempo. It's true that in Berlioz's work the basses aren't doing it, and they're known to be the slowest instruments in the family, but since there's no friction against the string (they only hit it), their greater weight won't be an issue here.
I thought putting the mute in and out could be almost instantaneous, like hand stopping. TBF I haven't made a very consistent distinction between both (even though I know there's some nuance), I could switch to the latter without problems. I really appreciate that you checked the score since I'm very prone to lapses and there always could be some hidden eyesore somewhere.
I've always been aware of that! I'm still not completely sure about this (this is one of the 3 spots of the piece that never satisfy me completely). On the one hand, I don't want to make the finale much longer because stuff like 7-part rondos are quite tedious IMO. It's meant to be a parodic denial of expectations where the woodwinds "mock" the theme instead of making a full restatement. But, at the same time, the finale is a note-for-note orchestration of what was an originally standalone piano piece, so maybe some extra tweaking would be necessary to make it fit with the overarching structure of a symphony. I admit I tend to rush work with finales.
There's a lot of intuition involved, I'm not a very calculating composer like Bartók/Schönberg/Brahms. Many times I start with traditional harmony and then 'parody' it. Many people tend to mention the counterpoint aspects in my music, and there's zero forethought in it, I just start with a main melody and some chords, and then add countermelodies that sound good and fit the chords. The chord language in this piece is very conservative, I basically only use chord structures that are 'legal' in common-practise harmony and conventional jazz theory (another thing is how chords follow one another, which many times deviates from both). As for scales, I use a lot of church modes, blues scales, and octatonic and acoustic collections. I've used some of Messiaen's modes in a few spots, but I need to assimilate them better int he future.
In the melody on p.9, I used something similar to Prokofiev's composition method. It started as a classical/romantic tarantella (see it here) I wrote maybe 8-9 years ago, with very traditional scales and chords. Then, one day, I decided to 'prokofievize' it, by making the skips wider and using more unconventional chords. The fact the melody emphasizes for a moment the Bb-F pair, a semitone below the tonic B-F# fifth a typical prokofievesque clash, while the F(nat)-to-E movement it does before the cadence is a jazzy blue note. Almost every chord movement in the main theme is a nod to a specific piece, including Grieg/Grainger folk reharms, Thelonious Monk, Ravel, Persichetti's book and the Final Fantasy soundtracks, all combined along more conventional things from common practise theory.
Hope this mess gives you some ideas!
Cheers!