Yes I saw them, my terrain layout is also very simple, It's 8 squares total. (small map)
1 square for a boss to stand in, so you can watch the next incomming wave,
one wave includes one boss.
In that square you get infomation like, what spells do the boss have, what do they do, how does the boss look like, damage, health.
In another square you choose a hero.
the 6 other squares is small small terrains for you to fight the bosses in, why 6?
well variation in your fights make it more fun.
The goal, to make simple terrains, a summon spot, and maybe trees, or what ever, it's all about eyecandy, looking cool thats where you fight your boss with your 9 team members.
So your terrains, like just say, that cvathedral could be a square to fight 10 waves in.
Thats all that is needed.
Details not much, if you want yes.
When I start the team, meaning the advanced beginning of my map, item stats, abilities, more detailed terrain
Yes you can do play out your ultimate fantasies in small squares