Can I get some feedback on this aquascaping idea please?

[Snappy]

Depending on what you will be having in the tank, flow is a huge consideration. Make sure that your aquascaping will let the flow through where necessary. I like the general idea although you will be limited where you can place corals. Perhaps one of the columns could be flatter on top or make ridges that you attach corals to? Again it all depends on what you plan to keep.