I'm looking at things a bit different with this build. While I've been in the hobby 20+ years, I'd never had an SPS dominant system until recently and I went a bit willy nilly in the 75g with regard to placement. Because of this, I've spent a considerable amount of time moving things around to create a more homogeneous look across the tank. Complicating things, I didn't know the species of the vast majority of acropora frags I was getting so it was hard to know what they'd look like as they matured.
In a bit of a departure from the more vibrant all-in-one "named" corals that are center stage these days, I want contrasting colonies next to one another; I want yellow acroporas next to blues, greens next to reds, deep purples next to whites, etc..
Other major considerations were placement based on species. Taller growth patterns will be at the back of the tank, tabling species will be low down and toward the front and/or side so they don't shade the corals below them, and encrusting montis/leptos will get their own rock structures on the sand bed so they cant grow onto the main structures (reducing husbandry) but they will all come together to provide that one-two, knock-out punch!
Of course, this is all just the plan...