One thing I've noticed is that games tend not to have vertical maps.
I'm not sure if its an issue with how radar is traditionally displayed being horizontal, but you don't tend to see maps with something like a large vertical core where awareness isn't just left and right.

Something like a gigantic tree with various branches holding buildings and lots of jump pads or vacuum chutes would be interesting.

Dropping down from above for a literal ambush, or striking from under the floor just doesn't seem to be favored, as most maps like having you run face to face into one another, so you can know where someone is long before they actually collide.