Well, "improve" is all relative to individual tastes, so you would have to say at least in what direction you'd like to take it, like maybe that you want it more lush in growth or something. Aside from that, this is excellent. it looks like a photo, and it's obvious that you have already mastered alot of what Vue has to offer, particularly in the atmosphere and the lighting. I do agree though that it could stand to have some more vegetation in the lower left foreground, but it's perfectly fine without it, and it's also well balanced as-is. Beautiful, really, and I suspect that since you obviously know what you're doing, anything you do to it would most likely improve it. :)