I think so far the best curves adjustment, control and implementation I’ve seen is in Davinci Resolve. Anyone who worked with it, will probably find it both powerful and intuitive with some unique features. Having something like that in DXO would be great. That being said. I think with all the sliders offered in DXO as it is today, its not critical or necessary to use curves anymore, but for those who prefer it and find current implementation inadequate, I vote for Davinci Resolve style curves.
Different Color Curves DaVinci Resolve 18 Tutorial
