Nice detail. Terrific improvement over the existing. It's amazing what a clean install and getting rid of straight lines can do for the aesthetics on a home.
I will just add one thing, simply a matter of personal preference. I would have used copper coming out of the back patio paver's, instead of PVC for the drain risers. I tie the copper into the PVC with Fernco's. Copper always seems to give a look of quality and permanence that you can't get out of other materials, again simply MHO.