In total, on this map, I'm testing 4 things:
1) Secrets. I only know their location thanks to the map I drew while creating the map. Otherwise, I would definitely forget where they are.
2) Well-assembled units (with automatic battles disabled), which won't be easy to defeat.
3) Graphical effects.
4) The very idea of variability, where the player has a choice. And depending on the choice, they get something specific.
And if it's not too much trouble, could you give ratings for each point?