It would be nice to have the function to create (presumably) the equivalent of a photoshop gradient map out of a colour chart in order to ballpark the colours in a shoot without having to jump through the hoops of creating custom ICC profiles.
Current workaround
I have generic ICC profiles for my camera and lens combinations as a starting point, but the learning process and creation of profiles is quite involved.
Incorporated color charts would be an amazing workflow upgrade. Davinci Resolve is a great example how this could be incorporated.