I think cobra is pretty lightweight right ? I've not noticed many slowdowns actually.
Also I am thinking as time progresses (and the hardware of 99% of our members gets faster) there is a growing need from a commercial standpoint to deliver detailed, beautiful maps.
In contrast, maybe one or two years ago, it was necessary to deliver lightweight maps to also appeal to the FH1 users with their - on average - older systems. Now that the FH1 userbase is not the #1 target audience, I think design philosophy can switch somewhat.
It's 2010 after all, and many maps deliver over-the-top FPS right now because they lack detail. With $35 videocards like second hand 3850 within the reach over almost anybody, I think we can safely say that more detail is currently a favorable thing to have.
This will generate a reputation of good looking mod, on a cheap game (BF2 is almost free now). = large potential crowd of players.
Just a few thoughts