I played through the game on Veteran difficulty as Humans. The idea of converting castles and dwellings increases interest and forces you to change your tactics.
However, there is a significant imbalance. For example, it's difficult to reach the Dark Elves, while the central castle is accessible to everyone. Perhaps this could be compensated for by strengthening the outposts?
Multiplayer: Господство, Извечное противостояние, Война за Магию, Торговая империя, Анатомия войны, Эксперимент
SingleScenario: Последний Рубеж, Трон, Элиралис, Вернуться домой!, Лабиринты разума
Campaign: Колонизация