Colour correction in Lightroom - why can't it be as flexible as ACR? Feature request.

A lot of my work is fine art documentation for museums, galleries and artists.
In Adobe Camera Raw, I can perform a Fraser/Schewe type calibration.......
http://www.creativepro.com/article/out-gamut-calibrating-camera-raw-photoshop-cs
....that allows me total control over colour.
Essential to this exercise is a Color Sampler Tool, the ability to work in a colour space that everyone who uses my files will be using (Melissa? Seriously!) and (ideally) 0-255 RGB values.
At the risk of provoking attack ;-) I really think that when it comes to colour, Lightroom is more Prosumer than Pro.
I love using LR for my personal work, but I can't using it for colour critical work the way it is.
I accept that there will be 1000s of photographers who are achieving perfect colour from LR using some method or other. I just wish that a few of ACR's brilliant featuers hadn't been dropped and people like me had the choice.
Any chance, at the very least, of having a Colour Sampler Tool in LR4, as well as a grown up colour space? The % readout I could live with - just about.
Thanks.
D.

"What's added over ACR in Lightroom is just file organization and tagging tools and some output options. Not much more."
Yes, the way the grid engages automatically when making lens corrections is extremely useful.
"There is a color sampler in Lightroom."
Where?
"The default color space makes FAR more sense than the output referred spaces in ACR."
Not sure about that.
"Percentage values are far more useful than 8-bit values."
Totall agree.
You just need to learn how the color space works and you'll be able to do the same things as in ACR. If you ant to know the correct values for a MacBeth chart in Lightroom values (i.e. sRGB tone curve prophoto) see this list that I compiled ages ago.
Thanks for the link.
"But again, just generate a calibrated profile using DNG profile or X-rite's passport software (both free downloads) and set everything to default in Lightroom and you'll get "correct" color rendering from almost any camera in both LR and ACR."
One of the key points in the Fraser/Schewe exercise was that the grey patches had to be corrected before the colour patches could be. This makes perfect sense.
It's not clear to me that the DNG Profile Editor either requires this to be done first (e.g. in ACR and then choosing View/Apply Camera Raw Adjustments when the file is opened in the DNG editor) or that the DNG Editor can somehow compensate for this automatically. Any thoughts?
Thanks again.
D.

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Colour correction in Lightroom - why can't it be as flexible as ACR? Feature request.

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