You've worked so much on that project and it shows. I thinks the vanished part of the wall around the city is absolutely amazing; nothing to say about it!
As for the hole, it is strange because the first thing I ask myself when looking the before and after image is "How did everything got into that tiny hole...and how?" So maybe the hole should be bigger and not so neat? Looking at the photo you post, you can see differents levels in the hole so the collapse is much more believable. We should be able to see bits of buildings. The actual hole look like a dig much more...I don't if I'm clear enough? Again, I'm french
Anyhow, congrats for your work! I't a lot of energy for sure (I'm learning that) and not that easy!