I love the original Dark Crystal Score. So magical.
Thanks for providing the midi file.
Interesting to find out how it sounds when using it with the libraries I have (maybe a bit different, but I hope not to much). Hopefully I have time for that during the christmas holidays.
About your midi mockup, maybe I am wrong, but it appears that the tempo is static?
If so, you can breath even more live in your mockup by changing the tempo gradually during the whole piece (both speeding up and slowing down). Maybe you could add the original soundtrack audio as an extra track in your DAW, playing it together with your midi tracks and find out where the original piece does speed up or slow down and draw those changes in a tempo track.