I haven't listened to the piece, but afaik typically transposing existing 12TET pieces into microtonal tunings are taking the intervals in the original piece and applying them to scales in the new tuning, with some creative license/taste to embellish where it doesn't sound so good. So it's not ignoring or limiting any pitches to my (limited) understanding, other than the natural way that pieces written in a particular key/mode will skip over some tones in favour of others for harmonic or melodic reasons.