Continuing the discussion from Add point to curve: This seems like a big enough question to deserve its own thread
On the one hand I think that included should be the default, but as @Grace pointed out below, in the current state of affairs that would be messy in its own way.
On the upside, that would make it obvious that you have a nodal issue, especially if some outside issue (kids, boss, etc.) came up, distracting one from straightening things out right at the crucial moment. But I’m not sure that’s a very big up.
On the relatively easy end of things, would be being able to add multiple nodes at once, & have the workpiece tool dialog pop up at once, like it does when the piece is originally traced.
Another idea, which I think might be what you edited in there, is to click the previous node either before, or after the one to insert before any dialogs pop up.
Or start with the node before the node(s) needing inserted, click additional nodes until you click the next already placed node, & then it finishes.
I think that it might also be best to choose which piece to add the nodes to before choosing them, instead of after, (as it currently stands.)
My fancy is that my third idea is the best.