I know what you mean and it’s something I’ve been pondering for a long time. I think I would rather not lose the single point of connection (you can look at the inputs and see where they are used), instead try to maintain the connection but work on making it less visually cluttering, for example:
Long wires would have faded centre portions (perhaps most of their length)
Hover would highlight the whole wire
Tooltips would show what the other end was connected to
Allow grabbing of existing wires to duplicate their source connection for a new sink point
Push pan (or some sort of start/end toggle mode) as you drag to help make long distance connections