Love the concept! but getting regular crashes in the tutorial :(
After a few attempts, where it consistently happened in one battle, I think it might be to do with certain units the enemy hero has.
If I cast transform on them the crash doesn't occur but if I don't, it occurs every time. When I mouse over the particular units in the victory screen, they appear to have no name in the tool tip:
Also, no matter how many times I beat the enemy hero, he doesn't disappear and always has 9 of those crash-causing units.
Update: played a normal game, selected the factions to ensure the Horde wasn't on the map. So far, no crashes. Gameplay is great, like a mix of HoMM and Total Warhammer.