hello,
about selecting multiple out/inlets:
there could be something like a "continue connecting" mode:
you make one connection, and after that you have a new "loose wire" comming from the same outlet, waiting to be clicked on the next inlet .... or vice versa depending of the direction where connections are made. if you connect from an outlet to an inlet, its a new wire from the outlet, if you connect from an inlet to an outlet, it will be a new one from that inlet.....
also, there could be a bigger "snap to" area around the in/outlets. that way it would be enough to move near the in/outlet to "snap" to it....
and yes, beeing able to select wires (either single by just having the mouse over it, or multiple by dragging and/or shift-click on them) is a good idea, imho.
greetings,
chris