I agree. I am learning Apple Color and Color Finesse currently.
But I think there are some people who are not colorists, who use AE’s color correction filters to do their color corrections, and I think AE is not really set up to do this well. I think PS is a much better environment to analyze and manipulate tone and color (sample points with variable sizes, target adjustment tools, out of gamut warnings, finer controls with many of the filters) After I made my corrections in PS, the adjustment layers can be imported directly to AE and applied to my comp–they are the same filters: curves/levels, hue/sat, vibrance, etc. and behave in the exact same way.
It’s just that in AE they can be tough to use. For example, imagine you are using the ‘Curves’ filter to color correct your footage. Besides the curve box itself being incredible small and hard to manipulate. You can’t click an area of you footage to place a point on the curve. You can’t set down color sample points to see numerically what you are doing while adjusting the curve–you need to run the arrow to the image area in question and look at the info panel then back to the curve then back to the image (and as far as I know I think the arrow in AE is point sampling the color information and there is no option to have is average pixel clusters such as 5×5 or 11×11).
I’m comfortable using all the color correction filters inside AE, but I don’t think they are hard to use in the AE environment.
But I agree that a colorist 3rd party app is best.