JD, I assume that you have all of my previous requests listed, but I can't help repeating a few here:
1. Simulate scene scale at export in order to exaggerate the effect of narrow depth of field (lowest possible fStop value is currently 1 which makes no real impact on depth of field in e.g. city models).
2. Make materials transparent (called 'opacity/mask' in the Material Editor).
Here Half Life has made a workaround with a perforated black png-texture, but controlling the transparency directly in the plugin would be much more flexible - perfect for placing 2d-people, trees etc in quick arch-vis'es.
3. Adjusting attenuation distance for Glass and Liquids (I believe this would greatly help users understand the behavior of color in tinted glass/liquids).
/Stefan