In Warlords, they didn't equalize Necropolis; they buffed other factions. Warlords Necropolis was still stronger than the Succession Wars Necropolis. The same is observed in Heroes of Might and Magic Online, where even a weak Tower can deal significant damage with Tetanus.
That's why I wrote "Cove" in the initial request (and Kostya thought it was a joke). Specifically, this tournament would be much more interesting in Heroes of Might and Magic Online (even instead of all other Heroes of Might and Magic Online tournaments). Because in that game, the factions are very well-balanced, and the groups with favorite factions would be more even in terms of the number of players.