Allow large/expanding controls for Curves/levels etc. like you can with gradient.

It would be really handy on occasion to be able to expand the curves control to be a large graph, to allow finer control. 

It is already usefully possible to do this for the gradient tool, and the flyout control can be enlarged for the curve tool etc, but the tool itself remains tidy.  It is a shame to have a posh high res screen but not be able to make use of it for accuracy everywhere.