https://youtu.be/jtEFqO4IxtY?si=N8izBK-AvSDT6uqI This is an interesting situation: the piece might sound empty for piano, because we expect always more out of piano music. But if he sets the same piece as to be played by an ethnic instrument, included ethnic virtual instrument, I guess it will sound better.
If the composer would want to keep this for piano I would suggest changing more the scales and create more situations exploring the possibilities of parallel mixtures of chords. The more octaves you have the more perfect has to be the melodic writing as its form. Because octaves turn everything very evident.
The pentatonic sound would combine well with an ethnic instrument. This shows how important is to work out the concept of the piece in each detail until the end.
Many of these pieces mimic Debussy’s “Cathedral” prelude and became a common place in musical universities. You need to be careful to add something more than the elementary and inpersonal mimic. This is what the re-conceptualisation does.