1 : Quality of the music. The assets and mix are often a pain to hear. It's like hearing an FL studio poopy orchestra like the billion ones that have been lurking around last years and destroying music culture on Internet.
2 : Context of the music. Thought I prefered yours to all others cause it was a bit more "in context" than the others, it was still not in the feeling of Tremulous. I don't know if you already noticed it but
- Tremulous is science-fiction
- Tremulous is dark
- Tremulous can be very silent.
My conclusion => Tremulous needs a dark-ambient music. I might think about making one.
Not the best examples I found but I quickly thought about this album of Ulver so...
(also maybe a good way to make you discover great things, noraj)