My workaround for this:
1) create a new version of the shot you're working with
2) delete the color nodes you don't want
3) grab a still of that. Now you have the "constrained" version of the correction and you can drag that into a shot. I basically create PowerGrades this way all the time. I also go to the additional stop of dropping in a huge TITLE on the edit page, so the accompanying Gallery still displays that title and I know what the hell it is.
Yeah, there are workarounds ( I could also just drag and drop node by node from the stills' Display Node Graph option) but they are all time consuming and with a client in the room, they are mostly a no-go. Time is money. And the thing is the functionality is already there, it's just for some reason capped at 10 nodes.
I think you can bounce around and do "Next Still/Previous Still", or use the View -> Stills -> Next Still & Previous Still command to choose whatever still you want. I'm impatient enough that I just say "hell with it" and grab the mouse and go. I do generally have a Gallery stills bin for every specific timeline, and you can use Track Timeline to have the Gallery keep up with where you are in the timeline.
I use the panel "Next/Prev" constantly, but my issue here is that I might have easily dozens or even hundreds of stills in a folder. Going through them one by one is time consuming. Using the mouse is faster, of course.
But I'd wish we could use the Temp or Default Memories slots as place holders for stills, for example. I haven't used them in years (in a time where memory isn't a problem, having a Still or an extra Version is an easier way for me to save a style rather than in a Memory slot), and reusing them or allowing the users to choose viewing their stills would be great.