My opinion: The corners too exposed. Makes it look too.... man-made? And the tank actually looks smaller with this layout. Maybe more stuff around the corners so your tank doesn't look quite so square... Plus your wood kinda small for a tank so big. I guess we won't have the resources amano has for large driftwood... You might want to fill in the back with some plants. Giant vallis maybe? With your tall tank you can have very nice looking vallis if your lightning is good enough.