That's cleaner than anything I've put under my car so far... Nice job!
I can't believe your coworkers (less one), had their shorts in a knot over this; If they never saw you mount it, and weren't crawling on the floor, there's no way they'd even see that you did a partial bellypan
(And... as you mentioned, it seems to give you a 2 mpg boost at highway. Stealth aero mods rule!)
The ONLY issue I can forsee with this, is oil changes. If you're used to using an oil extractor via the dipstick already, then even that is a non-issue.