From Michael's email: If -dUseCIEColor is set, we would use the PS CIE color definitions for our default color spaces and use the CRD for the device profile. Basically ignoring the ICC profiles that are normally set for the default color spaces. This would be done by converting the PS CIE color spaces to equivalent ICC profiles and putting those profiles into the ICC manager. The input side is already done for this (more or less). The CRD is the part that is missing
Bumping up to normal level from enhancement and making P1 so that I make sure to get to this prior to the next release.
Changing this to an enhancement. I don't see there be any demand for this.
In fact, I am going to close this as I everyone uses ICC profiles these days.