By the way, on this map, it is absolutely necessary to ban Markel because with him, the Undead are simply blatant cheaters – with him, I completed this map in just 17 days by simply running from town to town and occasionally beating up weaklings.
As for the artifacts of logistics, they still need to be collected, and that takes time. With such easy access to the opponents' castles, you need to focus on eliminating opponents rather than collecting artifacts.
Regarding the Dungeon rework, it would be nice to add a couple more factions there (for example, organize Dark Elf caves and Dwarf dungeons). In my opinion, there is enough space, and it would be more fun to play.
However, to maintain balance, instead of a snowy Siberia, you should create barbarian steppes or undead swamps. Although, as an alternative, you could put the undead and their swamps in the Dungeon instead of the Dwarves.
Well, as I already said, you can play as any faction on this map, so anyone can end up underground; I thought of making the Dungeon as an auxiliary location. I won't add more players there yet, but I'll keep the idea in mind. Regarding Markel, he needs to be included, even though he is an overpowered hero; the map should be completely balanced so that all heroes have equal conditions. I will think about it, thank you.