Ah glad to see you finishing this up!! All that hard work pays off!
One thing I notice, and I think others are feeling too is the lack of a focus point. The environment is filled with beautiful assests but it has a very busy feel.
Maybe trying playing with the lighting like Jeffro said. I might try and dim the lights near the edges of the wall, just have the lights above the center of the level lit up. The globe could be the focus of this environment, so you could create a spot light and highlight that, the darks and lights would also crate some nice contrast as well.
Here are a of couple of quick paint overs to kinda show what I'm talking about, I'm bad at explaining this stuff. :P