In my opinion, I'm all for replacing undead with dark knights! I remember in Heroes of Might and Magic III they were my favorite... And here, I only had one chance to play as them. It's a pity... But I don't really like the undead. Maybe I didn't appreciate them enough, or maybe the units themselves are just... bland... Their special ability is only good in the early stages, but when you encounter 10-15 dragons, they're doomed. I was pleased that the dragons look reasonably good next to other units, like in Heroes of Might and Magic VII. Before, they were weak, but now they're much stronger! Who knows, maybe in Heroes of Might