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

skeleton mage - lich) instead of them, a creature) apparently, liches and skeletons could become too similar)
ice, dragon, and snowman - there are enough elementals))
werewolf - good) but it wasn't in any part, except for some version of Heroes of Might and Magic V))
Zmey Gorynych - king of dragons)
witch - sorceress in the add-on)
scorpions, spider - there are already many animals and insects in Heroes IV)
angel of death - devil)))
advanced vampire - there are enough regular ones)
light rider - champions) the opposite of the dark ones, only without magic and magical skills)
snake - the same dragons)
dragonflies - mantises)
demigods - I remember them being in Heroes of Might and Magic V)) no need for them) the fire elemental looks like them)
skeleton archer - no upgrades) and we don't need more of them)
high monk - the same story as with the vampire)
no need to make it like in Heroes of Might and Magic V, where there are 3 types of snipers, 2 types of monks, etc.)

the rest is nonsense)))

I won't argue about the tank. It's an overkill. The devil doesn't match the angel of death in terms of its structure. Death should be neutral. Why not dragonflies? (a new creature). Zmey Gorynych - king? I disagree. Gorynych has three heads. A champion cannot be the opposite of a champion of darkness. He's too weak. No need to involve elementals. That's a different conversation. A new level 4 vampire, why not??? The same goes for the monk, let him be the strongest from the castle of life. Demigods - like Hercules.
and gods - a level 5 creature.

Added after 8 minutes
In my opinion, elementals should be the strongest. They control the elements, and an attack of their element should not cause them damage. For example: phoenix against fire. Any physical attack - against earth. Ice demon against water, any direct damage magic - against air. I would also create an elemental of light and darkness. Fire - chaos, water - order, earth - strength, air - nature. Light for life and, naturally, darkness for death.