More than often I find myself testing out curves hooked to an RTPC that requires some tweaking. But once I've made some progress I'd like to be able to "bypass" that curve, so that I can compare it to how it was working without it. Pretty much the same approach as muting/unmuting a sound that is part of a bunch of layers. Currently, in doing so, I have to delete the curve and then be cautious about not missing anything (as long as I don't forget to undo it).
Same thing would be great for the low pass and high pass filters!