Yeah, had the same thought later 
So I was thinking would be any better use for such shortcut… Maybe… if Alt+Click wouldn’t only disconnect execution links but also it would automatically select all connected parameter nodes - ready to move. This way it would be as fast as selecting line in text editor. Now you need to perform few operations/clicks less in order to simply select a “line of code” to move it somewhere.
And that could actually make noticeable difference.
I mean, I always look for ways to make a basic blueprint editing faster and easier. Because blueprints suck mostly if you compare compositing graphs to typing text. Visual scripting here would much better if editing code would be faster and required much less clicks. It’s doable, many edit actions can be optimized. Epic just never truly focused on it