Thanks all for your comments/advice! I appreciate the time you took to listen and write down your opinion! I agree with most of them. Indeed, fine tuning never ends, which is a good thing.
The only possible disagreement I have would be about the "take time" aspect.
In fact, the "rush" aspect takes a big place in my vision of this piece.
I have a (somewhat stupid

) vision of a soldier that keeps running and running around a devastated city, with gunshots all around, with no time to rest. No peace. Even the sotto voce section at the end serves the purpose of making the final descent more fatal (because the poor soldier dies at the end. Or does he ?).
Also just one thing surprised me:
tiiiime. Not like stopping in tempo, but so you don't miss the chord.
I'm pretty sure I didn't miss any RH chords in those sections!? (right hand chords with the left hand descends).
But it's really not a big deal anyways.
Thanks again,
Cheers,
R.