What would you change in Heroes of Might and Magic IV?

What needed to be removed:
1) The hero on the battlefield as a combat unit.
2) Army movement without a hero (it was possible to make captains who carried armies with them, but moved 50% slower and did not gain experience for killing monsters on the map).
5) Change the defense and attack mode of castles (the moat near the castle should deal damage. Make towers that attack the enemy).

The fourth Heroes is not an add-on to the third.

3) Separate Necropolis from Inferno.

Yes, I would also like to see demons separate from the undead, and liches added as units. Also, in the fourth game, there are three "good" races - Life, Nature, and Order, and only two "evil" races - Chaos and Death (Barbarians are kind of neutral).

4) Remove the Chaos race (or rename it).

What's so bad about Chaos?

6) Change the textures (of the castle, both in battle mode and in travel mode. Some creatures, such as imps and others).

Some textures actually look silly, for example, the hideous face of the same imp, but this does not affect the game in any way.

7) There should be more obstacles on the battlefield.

There are already enough of them, and sometimes even too many. I have had cases where one of my units at the beginning of the battle could not move because it was blocked by obstacles on one side and by my slower unit on the other.

And that would make for a great game.

It would be a great mod for the third Heroes.