My comment to Larry, once I managed to see what he was talking about, was that this reminded me of an over-inking problem I had when starting out with Piezo on my old 2100. The location and pattern is much the same as the ripples I used to get. I had to solve my problem by printing at 1440 rather than 2880, and then using a spreadsheet to scale up the numbers in the .quad file to compensate so that the print didn't appear too light. Not a very elegant solution.
Others have reported ripple-like patterns. This post by Michael mentions it on CRP, which surprises me, given how thick CRP is. Walker blamed the printer platen, although I struggle to see how that's at fault if printing at 1440 "solves" the problem, as it did for me. Another user had ripples on EEM, and Dana commented that it's not uncommon when printing on thinner papers.
Now what Larry is seeing seems to be subtle variations in colour. I can't say for sure that it's the same phenomenon. If you turn the page over Larry, to you see ripples, or is the only variations in colour?
The R2000 has two SuperFine Print Quality settings, one with MicroWeave at Super and one with a lesser Microweave setting. I'd try the lesser setting, and then perhaps a quality below fine. I'd also try a glossy paper. Depending on what you find, I'd be contacting Epson.