I find that with Capture One and or LR, both offer so much now for a raw file, that I rarely if ever do much work in CS anymore. Maybe some final tweaking to either sharpening or color. But both tools have so much power now it's amazing. On average for me a D800 file will be sometimes as much as 40 different steps in LR or Capture One, and a Phase One file probably even more.
I tend to work up a file and then move back from it for a few days, this allows me to come back to it fresh and often I will catch a spot or area of the image where I was going after it too much, and I will want to change it. With LR, it's so simple to just scroll back down the history and find where I want to start, where as with Capture One, it's pretty much a start over, ie. with a new variant of the file. Where the history to me comes in so important is when you are trying to finalize color, WB or just a certain part of a image and some times this alone can eat up 10 to 15 different steps of history.
Capture One already keeps up a cache with the adjustments made to each file, (in session mode this is kept with the files not sure where catalog mode puts this) so to me it would be a coding issue to create a data base to show the adjustments.
I am always surprised to see that ACR also has no history of adjustments, at least I have never found one like LR has, which is one reason I will always defer to LR over ACR.
Paul Caldwell