Suggestions: diversify the surface design with grass, bushes, stones, and mushrooms; don't forget to adjust the plateau near the Dungeon exit in the southwest, as it's a bit too square. It would be nice to rework the dead zone, making it more gloomy, with fewer dry trees and more dry bushes and swamp water.
The plot itself is very interesting and unique. The presence of a boss is excellent. The design is generally good; the Dungeon is one of the best I've ever seen in the game.
I used to download Heroes 5 EWA just for fun, and there were definitely creatures of level 9!
UPD: I decided to make some changes. I wouldn't say that there are no stones and mushrooms in the grassy area. They are all there. I added more bushes and made the plateau less even. It's more difficult with the dead lands. Considering the large body of water in the middle of the map, separating the zones, adding swamp water there would be an overkill. I'll try swapping the types of terrain to make it look gloomier.
Цикл "Закадычные враги": "Особенное гостеприимство, "Супероружие", "Меж молотом и наковальней"
"Падение Шантири"
Кампания для "Кодекса Войны"
"Выбор Сагиттеля"