Does the output from a Bayer pattern bother you like that when you shrink it to 50%? Because "100%" means two very different things between those kinds of sensor.
Yes, I can't get the same quality from downscaling Bayer/pixel binning :( Maybe 100MPx Hasselblad is getting it done though from what I've seen. I guess the averaging interpolation is missing out on some signals picked up by my eyes/brain and once you finally see them on Foveon and can't see them on Bayer, you can't unsee it any longer. Of course, Foveon has its own problems, some might be related to immature manufacturing tech like banding or purple-green patches in shadows, but when paired with top-end optics in Sigma Art lenses, I simply can't avoid feeling unhappy with Bayer sensors. I have a perfect color vision as well, so I can spot issues where most people can't.