very nice insights and some food for thought here.
but id like to steer back to production style, because new school goa seems to have much more focus in mixing/technical side. More "perfect" like kicks, basslines, hihats, etc. Everything is precisely engineered to absolute perfection (to the best of the artists ability anyway) whereas the old school goa; was much more about the actual music - and the mix and the sound itself was secondary.
now, with new school, i feel the sound and the technical aspect of the track is more in the forefront than it was, and the music comes almost secondary, or at the very least; on equal grounds.
this is ofc a very broad generalisation, and there are tons of exceptions..
but as to the discussion in the above comments, i think those tracks (MFG, Calfornia sunshine, BPC, yahel) are very old school BUT its a more floaty type of goatrance. (which happens to be my favorite type)
I like the way your brain works Psychedelic Superbeast
we are really getting down into the core, the essence and soul - of goa here.