How would you describe the change on your plasma after colorfacts in terms of low brightness detail, contrast, and noise?
I think plasmas are truly wonderful, but, as we all know, have peculiarities in low brightness areas which are not flattering. When I calibrate my plasma according to the gospel of NTSC, it becomes too flat and/or noisy looking. So, I calibrate as per test patterns, then tweak it a bit here, then a bit there, in order to cover those shortcomings. BTW, I am not discussing Grey, color, tint settings, but what interests me is if Colorfacts can improve detail and contrast in low brightness areas...This is where I doubt it can offer any significant improvement.
I am sure future Plasmas will gradually improve, and then any proper calibration system will be superior to any home brewed version. But, for now, we have some inherent shortcomings, and my assumption is that not much can be done to improve them technically, but can be bettered in terms of overall perception when it comes to shadow detail and contrast. And this perceived improvement might give deserved credibility to the Steaming Rats method.
As Rich suggested with his #4 option, both may actually complement each other afterall.