Which version of Heroes do you like the most?

Giving it a 10 out of 10 left me with some vague doubts. If everything remained as it was, but a patch 5.0 was released, adding just a few ideas from the fifth installment, it would significantly improve the game. The gameplay, which had become somewhat tiresome, would be updated, and the standards would change. Of course, many wouldn't accept it, but I'm not suggesting turning Heroes III into Heroes V. Just 2-3 fresh ideas for each faction would be amazing!