It would be great if we could simply right-click (or alt-click or something…) to add a reroute node to an already created path.
Reroute nodes are fantastic in my opinion, as they make your code easier to read and understand (i use comments on them to explain the kind of data going down the wires). But when you want to create one, it takes 2 clicks if 2 nodes are already connected! 1 to drag and create the reroute node (that dragging adds a bit of time too), 1 to reconnect the node to where it was connected before. That may not seem like much, but when done TONS of times, it would be a nice step to simplify.
So my suggestion would be to be able to click on an already created path to add a reroute node at that spot! 1 click, no dragging, fast, simple.