I finished this project a year ago (kind of old laptop, took 8 hours to render), and Blender changed a lot in that time. I decided to just retouch it with new things such as the Princibled shader and de-noise rendering (quick 12 minutes on my new desktop). The darker one/ first one was the original render. I only retouched up on the materials- so the half white/yellow window was not fixed (emission panel is at an angle and does not even touch the other half)
What are you trying to accomplish with this piece? 'Cause I have things to say but don’t want to critique on things you aren’t concerned with.
Materials are the biggest problem at the moment.