The function almost reminds me of like a symmetrical version of Dungeons of Draknor map, which was all one way assaults. I was fond of the novelty of that map, but this one as koontz pointed out, probably has a lot more hurdles to overcome.
What other ideas do you have for maps? I usually suggest first time mapmakers finding something that has a broader taste level for their first time map. Once you complete a map, in general people seem to give you more leeway with content and ideas since you've proven something.