With a couple of members from The Realm we take on 5 players in an unbalanced game. https://www.youtube.com/watch?v=RrXLxNcsDKc
A lot of people aren't good at doing multiple attacks on various fronts. They went stragiht into the walls when they could have gone around. I imagine people will begin to grasp the 3-dimensional nature of gameplay as they get practice.
Nearly 20 years of RTS 2d isometric maps where a thing like going around wasn't an option will take a while to get used to.