Which colors ?
Matte BlackPhoto BlackGloss OptimizerOrangeRedMagentaCyanYellow
Just omit the red and let it be replaced by grey/light black and here you are: no black switching and ABW mode with tiny 1.5 pl droplets that produce fine grainless prints like printers with light colors. Same hardware, just another built-in RIP driver. Orange is beneficial for skin tones and by using Vivid Magenta instead of normal magenta, better reds can be obtained without a dedicated red ink cartridge, which is than replaced by the necessary grey/light black ink for neutral black & white photo printing.
Apotheker: Could Epson not produce a printer with the following ink configuration:
gloss optimizermatte blackphoto blackgreyvivid magentaorangecyanyellow
So 8 channels, both blacks loaded simultaneously (no flushing needed), gloss optimizer, light colors removed in favor of using small droplets up to 2 pl, grey for ABW-mode and orange combined with vivid magenta to get the same results as the magenta, red and orange combination of the R2000 and gloss optimizer to minimize gloss differential/bronzing as the R2000 does, but with grey ink like the R3000 for neutral B&W prints.
Also a user replaceable waste ink tank, like the Epson Pro 3880.
That would be winner, more than this upgrade of the R3000.
I don't believe you get the point: my proposed printer is the same size, but a different ink configuration and an extra waste ink tank underneath. Actually: the R3000 is only slightly smaller compared to the Epson Pro 3880, so it is relatively very bulky. The gloss optimizer could be sitting on the place now taken by the matte and photo black together with a larger 60 ml capacity (as GO is consumed much faster). You still will have the same printhead and same printer, but with aformentioned ink configuration.
Could Epson not produce a printer with the following ink configuration: