For me the solution to subpixel issues with tiny fonts is to not do subpixels. I have been looking at bitmapped fonts my whole life so I don't see any reason to give up all that perceptual context.

Which is why I ended up buying a replacement 24" 1920x1080 recently. I needed pixels large enough to distinguish with my fave small font. If I want more pixels at once on the screen I need a larger screen.