The new model supports HDMI 2.0 with 18Gbps, which is required for HDR @60fps.So I am also looking at the Epsons. But I do not see much difference between the 2015 5040 and the 2020 5050 models other than price.
I am not aware of any way to adjust more points. Note the these 8 points do not even provide independent adjustments for R/G/B, so they are only for gamma and not for greyscale.I also do not see as many controls for calibration as some ISF certified projectors. 8 point greyscale seems very inadequate for a 2020 projector. Is there a hidden service mode with more settings?