I've tried a strict elimination diet but it didn't help, and my current diet is pretty strict anyway.
As far as acne, I need to use Retin-A because I have indented scarring that I want to minimize, but I'm trying to stop using my other products little by little. I tried the water-only thing before and my skin went CRAZY. Must be nice not to have to slather chemicals on your face every day!
I might stop the supplements for a bit just to make sure they're ok as far as breakouts goes; sounds like a good idea. And your last point about the importance of giving this lifestyle time to fix years of damage makes sense. Just gotta be patient, I guess!