Why my Camera raw for PSE8 has some lacking regulations in comparison to that for PSPCS4? They miss the cards HSL, Division tones, Correction slow, Calibrazione camera and Default, use C.R.220.127.116.11
Because PSE, at about 1/10th of the price of CS, has a reduced features set. The idea is that at 10% of the price it gives 90% of what you really need.
If you miss the full power of ACR in CS, there is another interesting solution : use Lightroom which has all the power of ACR at an affordable price.