The artpass looks very nice for this map, but I did notice a couple things that were off.
This vent levitating off the wall in Blu's first spawn. (Literally unplayable, also ignore the crime scene on the floor.)
There seems to be something covering this corner of the map into darkness, I think it might have something to do with the skybox.
These pipes look a little bit like Australium with the reflections. Not sure if it is something you can control, but figured I'd point it out. The transition room right after B has a few more of these iffy pipe reflections, but these two are the ones that stood out the most.