It looks fine, shut up.
it has too many random colors
When is the last time (or never) that you have been in an industrial/production complex. The colors here are tame. In reality, each pipe has a different color depending on what is in it (compressed air, water, natural gas, oxygen, nitrogen, coolant, etc.) and some times different color combinations to indicate flow directions. Doors are strange colors depending on if they are fire retardent, blast resistant, auto-close, etc.
And yes, the FPS worry me but it sounds like it is being addressed.