Engine looks great and I like the new shadow system
About penumbras lighting system, have you guys thought about using deferred shading? Or is that too hardware strenuous for your liking? I recently switched my engine to deferred and have found the speed increases are phenominal with scene complexity scaling. It works especially well in systems where you have lots of low coverage lights (aka night scenes and other things you can think of). It can also greatly speed up soft shadow rendering.
Srry, not going on a tech rant here, but I am very knowledgeable in graphics technologies and would like to help you guys out in a way. I really admire what you guys are doing with the genre (that is, breaking out of the mindless fps violence) and would like to help in any way I can.