As a relatively new user of UE4 I’ve got used to click-drag to connect nodes. But it’s been brought up to my attention how this is really not ergonomic, and can lead to carpal tunnel among other issues.
A simple way to fix this in UE4 would be to click-release to pick an output, then the output arrow would follow the mouse cursor until you click-release it on the destination. That way the hand does not press for long period of times. What do you think?