LOVE the detailed write-up. Building placement and segmentation are well-done. Definitely one of the better TH7 designs. I do have a couple of suggestions that could possibly improve its efficiency.
http://i.imgur.com/LujzVIS.png
1. In my opinion, a separate compartment for each Air Defense is a bit redundant. Use the walls highlighted in white to provide some additional coverage on the blue line for your mortars. Might not be as symmetrical nor artistic as you were going though.
2. Swapping the AT's to the indicated area will provide a more symmetrical Point-Defense/Air-Defense spread for your design.
HTH :)