Not an aquascaper by any means so will just ask this:
Are you planning to have something under all of that?
If not, seems like most of the small caves/passthroughs near the bottom will just be burried.
The things that would bother me down the road, just personally, are:
- no room on the left side glass and seems like little room at the back
- a lot of the rock on the left is kind of straight up so tough to mount many corals at different heights ... but maybe you have a plan for that
- not sure if you're planning to secure all of the pieces but one continuous structure wouldn't be my personal preference
*no criticisms there,,, just thoughts
Good luck...