It's funny that you mentioned Hans Zimmer in your previous post because that is exactly what I thought of when I heard the opening of the main theme! Definitely loved the deep growling in the low brass throughout the piece, and I second Fartheststar when I say that the volume swells really do it wonders. The dynamics (and the timbrel shifts like at 1:18) give the piece a nice body. I thoroughly enjoyed it! Seeing as how I'm not one of those types to just give criticism simply because, I don't necessarily have any advice that I feel needs to be given.
I checked out some of your battle themes as well! I liked the dissonant and sporadic interludes scattered throughout battle theme 1 (it felt as if you let a little bit more of the composer in you out). All of your battle themes contain a driving force and tenacity that I would expect out of a good battle theme. Battle 2 really impressed me, though I absolutely loved the time signature change in Battle Theme 1.
I understand what you mean about finding clients wanting something less pounding, and more intricate. A friend of mine recommended me what ended up a semi-okay anime with a breath-taking soundtrack! I don't know many developers (definitely not the ones I'm working with) that would be open-minded enough to garnish (or more importantly, have a project that would require) a game soundtrack of similar comparison.
Taku Iwasaki reassured me that not everyone in media development (despite the media type) wants the same ol', same ol'.
I will say that, despite the arduous road you seem to be taking to create music that suits your client's needs, you are doing a superb job!