I think this is the last junction box behind drywall, at least with all the wining I can now see this has to be the last. It didn't take much to cut away the drywall, expose the box, then remove the drywall where the outside lights are, follow the wiring and run new stuff. And yes I took out the junction box.
When I re-ran a wire for a plug in the living room so it wasn't exposed I also feed the outside light switch from that plug. It originally went up from the junction box, to the light at the base of the stairs, across to the switch. Now I just ran a line from the switch, up the wall, through two beams, down to the left light and then across through the existing holes to the other side. Very easy.
Put back the insulation, and taped it up again.
The drywalls back up and after a little mud and sanding you'll never know I was there.
