Ok now, what I am going to ask for is not as big a deal as the title may suggest, but I think this feature request is small and useful enough to have a chance at being implemented in the near feature
This request is meant to boost the blueprint/material (and alike) editor workflow and is about connecting wires. To be exact, this is about dragging off wires of an outgoing pin of a node and dropping them off at ingoing pins at a different node. One frequently encounters the situation, where one wants to connect the same (outgoing) pin of a node to multiple different nodes, which are most likely all aligned visually horizontally or vertically close to each other. And with the current workflow, we would need to drag that outgoing pin off for every ingoing pin we would want to connect it to. This can become quite tedious (especcially when the blueprint/material editor graphs get large) as you have to move the screen back and forth every time you want to drag off from your outgoing pin again.
Which is why I want to suggest the following solution: Please introduce a button (for e.g. the SHIFT button) which can be pressed and held down before dragging off the wire of the desired outgoing pin, in order to allow us to release the left mouse key without losing the touch to the wire. In this mode, one could simply move the screen around and click on every ingoing pin, one would want to connect a wire to, orignating from the outgoing pin in quick succession.
How does that sound? :S