Nice work. Work with your AO a bit too keep shadows from condensing so much in the corners. That might mean a mixture of increasing the radius and decreasing intensity. Also, maybe play with some other sorts of camera angles. What if you had more natural camera movements - as if it was actually eye-level of someone walking through the space? What would they look at? Some shallow DOF extreme close-ups are nice, but use those sparingly. Shallow DOF doesn’t help show off wide spaces.