Your tank is amazing and very similar to what I plan on doing. I enjoyed the build process very much and learned a lot as I am shopping for larger rimless tanks. However, I think i am sold on eurobrace since these larger rimless tanks scare me (especially ordering from canada). I might go with coast to coast aquariums as they are closer and i can always inspect the product.
This is my opinion regarding your aquascape. The larger piece on the left, you will eventually regret it being put in there - later down the road when it's encrusted overgrowing with 100's of animals. It's way to overpowering and you only need a small area for corals footing (leaving them air space to grow up).. For your tank's height your corals will grow to the waterline very quickly. It's also giving way to much shade to the substrate below it making it a low par zone and you'll have to put corals that need low light.
I think besides this piece everything else is great. I would just decrease the height somehow. We reefers love symmetrical, but in a real reef nothing is symetrical. I recently removed about 40% of my LR and my tank is crystal clear and free of aiptasia as I can get to them better. I noticed these improvements from removing rock: no more detrius/ deadspots, better flow, smaller fish/ inverts stopped disappear from my view, Pest become controllable, tank looks larger, I dont want to add more corals then I need, etc.