I see your point of view, and I'm glad that you chose an instrumentation appropriate to define a certain type of atmosphere.
**side note: how do jingle bells fit with the SSSR?**
Unfortunately, I don't agree with your reasoning that there's no point in making something "complex" unless it's going to be used for something.
If nothing else, you should do it for the improvement of your compositional style, the love of your craft, and for practice - so that you know that you're confident in doing it when it is required, instead of just telling us that you can and then only making a moderate amount of adjustments.
I believe Killermonkey had this to say in a different thread:
"We are not interested in hearing about wasting time, if you even knew how much time I wasted coding this mod by writing thousands of lines of code only to have to rewrite it all over again because it wasn't efficient or needed to be more robust you would cry. Or how many models I have made and how many times I reweighed characters after someone already did it because it needed to be IMPROVED."
One of the tricks to composing is knowing the audience you are writing for. It seems as though the purpose or "audience" of your music would typically be ambiance for a single-player level - while bond is sneaking around and cappin' those lovable inept guards.
The audience that bass and Audix are writing for is an audience of DM-online-carnage-auto shotgun in the face- err'body get's owned (by vc) mayhem. Intense gameplay must be complimented with intense music, (unless of course you're writing it to be specifically ironic such that when someone dies it feels like Saving Private Ryan -> Adagio for Strings (Agnus Dei Op. #24) - Samuel Barber.)
Atmospheric music does not have to be ethereal and slow, it illustrates a mood. The mood of your music should meet the rigors and demands of your audience, which for the purpose of this game, is duel-action: the purpose of online play, and the people between the ears listening.