Sure. I'll preface this by saying I've only looked through the Gen II a few times, and was always impressed by the color and clarity of the glass. I'll also admit my background is in geology, not material science or in high end optics/physics.
But what I'd like to see, is an incremental upgrade to the glass, similar to what they did with the PST Gen I to Gen II. Can I give you a qualitative value on the "improvement"? No, but I can tell a difference when I'm sitting behind them.