My plumbing to my sump is different because I use an overflow instead of a reef ready, so I can't comment there. A couple of thoughts on the sump:
-If you can raise the 3rd baffle (all the way to the left, right before the return pump) to 1/2" lower than the 1st baffle, you might be able to force more air to the surface without causing a waterfall effect.
-If you can add a baffle (or even a pair for the over under) directly after the skimmer and inlet section and can leave a wide section in the middle, you'll force a lot of air out of the water in the first section of the sump.
The build is looking great. I'm digging that canopy!