I won't comment on your rock layout because I love lots of open spaces and open sandbed areas.
Rock bommies and such ...
OK, I'll put some input in ...
Now that I've had my tank running for 3 years, I've found that I regret many of my LR position choices.
If I could re-do my stuff, I'd have lots of low rock -midtank- for SPS growth and keep the rock to a minimum as to not affect/restrict flow from returns/powerheads.
My ideal tank/reset my tank will have rock no higher than 1/3rd the height of my tank, and probably not nearly as much poundage as what's recommended as far as pounds/gallon goes.
You have so much room in your tank, but so many flow issues to think about ....