Clan Battles

It's not entirely clear why this is a scenario map. It's typically a multiplayer map, symmetrical (if you can call it that for a game with three players). And what's the point of the sea? To have the same surface area as the dungeons? It would have been better to add more territories on top. Why so many unnecessary dwellings? Anyway, I played through it with a hero and didn't understand... what's the point.