Nice, at least on 'paper'. I have doubts about those terrain breaks or what you call them, outside the walls?
I hope they at least have numerous passages in them, I worry about cull-de-sac enclosures into which you get snared and need to retrack your steps.
Usually those are more acceptable on beginner levels, when various obstacles like these help you 'divide and conquer' mobs, when you have business to do on the maps (kill mobs) and so move about slowly. Good example are those different ground levels in mines like SV mine or MMine. But for higher levels that have no business to do on those spaces, it is just an obstacle maze, steering you about and snaring you in on your way somewhere else.