EVEN such a fundamental aspect as MOVEMENT ON THE GLOBAL MAP
In the 4th game, there are monsters and heroes, spells, castles, and artifacts. It's a normal, but underdeveloped continuation of the series.
And the 5th game is a step back to the 3rd game + features from the 4th game.
I don't know how blind you have to be not to see that the 4th game is completely and utterly different.
Offtopic: Can't you increase your morale?

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!