I think I can be a bit more helpful.
Psytrance is missing "HARMONY".
We have melodies. That's only a single note at a time, plus a more-or-less droning bassline. People occasionally get jiggy with the bassline, but I will readily acknowledge that rapid chord progressions in which the bassline changes tonic notes all the time can be nauseating at times, rather like an airplane changing altitude a lot and often.
What is missing are harmony lines that go WITH that melody and imply the richer harmonic world of chords and, well, harmonies. It's common for choral works to be written with 4 parts of harmony, for example. We occasionally get accidental harmonies as the melody/lead sound may have a delay effect and we hear the leftover results of one note trailing over the next note(s).
We occasionally get *real* harmony, with a background pad sound playing gated chords, for example, but I miss richer chord options than the simple major/minor diatonic triads, like 7ths, 9ths, 11ths, suspended 2nds/4ths, secondary dominants, tritone substitution, etc. Getting beyond the basics to the deeper more complex emotions, etc.
I'm missing richer harmony. That would take trance beyond Goa trance, in my book, which is where it needs to eventually go, in my opinion.