That pattern looks respectable. I've setup AAM gears before and they will pattern just as your images portray, a diagonal pattern across the gear faces.
Most gearsets, new or used, will never read a perfect pattern. Pinion depth will affect pattern a lot more than backlash. I might play with backlash a little to get a contact pattern off the toe or heel of the gear. As your gears are demonstrating, an OEM gearset will read better and more consistently than aftermarket. With that in mind, make adjustments to compensate for the evils and forego a perfect pattern that may never be obtained.
Considering that this is your first, you have done an excellent job and pattern looks acceptable to me. Pattern is not off the toe or heel of the gear and no noteworthy hard edges towards the face or flank.
I usually check backlash at three points, in thirds, on the ring gear. It's not often that I would measure .008", .008", .008". If you use that method, what is the range of backlash you get at three points?
One full hole will move you too far on your preload and backlash. Preload on used bearings is two holes from bearings seated after rotation, three holes for new bearings. When you optain optimum preload and backlash, the holes will often not line up perfectly with the keepers and you will have to cock the keepers a little bit.
