The divider does help but you got to get the pup out in the middle of the night. At 9 weeks they can't hold it all night.
I kept my rain boots (Russ came home during the rainy spring season) jacket, flashlight & leash by the door so it was easy to get him out fast. When I heard him to stirring around out we went. Honestly just a few weeks of this and he was house trained. German Shepherd pups are easy to house train as long as we are consistent.
Glad you ditched the pee/poop pads