I agree with louoates about liking the balance and the two spanning lines.
I may not understand the light at the base of the furtherest glass wall. However, if the rest of the wall was once as glossy and contrasty as the part over the central roof, then it might provide more of the bright counter point Rob C. is looking for. That reflective patch is already quite effective.
Which isn't to say I would know how to go about selecting it, but if you can make a picture this good...