There are few factions, and the names are idiotic.
I didn't like the fact that troops can move around without a hero. It turns out you can distribute ten imps among ten armies and have them collect all the free resources, go to enemies and collect their free resources.
I really didn't like the fact that there are very few creature levels (only 4, right?)
I didn't like the choice (at the last level).
I really didn't like the daily increase (it's just absurd). You can buy troops every day and send them to the hero.
There are fewer artifacts, and there are no assembled ones at all.
After the third game, mixing troops in cities seemed absurd.
It's idiotic in battle – an archer can't shoot at an enemy unit if there's another unit in front of him.
I didn't like the graphics – it's just crap, not pseudo-3D.
Inside the cities, the buildings don't look good at all. If in the third game, as the city was built, each building complemented the others, then in the fourth game, the building images are simply stuck on top of each other.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!