What are the advantages of Heroes V? How do you see them?

It's so great, you need to not only organize your defense well but also try to guess the opponent's tactics!

Question: Should the attacker have an advantage over the defender in the case of a surprise attack?
Answer: Yes. Always.
Question: How will the stack division at the moment of troop deployment, as proposed by Nival, help the attacker?
Answer: In no way. Moreover, if the defender was aware of the number of the enemy beforehand, he can divide his stacks in the most optimal way.

The attacker should have an advantage. If his opponent wanders around the map with a single stack of 100 archers, that's his problem, and he should die quickly and painlessly. That's why the attack is carried out. Does this innovation provide such an opportunity? No. Because even the worst player will definitely divide the stacks at the moment of deployment. If one of the players cannot control the situation, then there is no need to help him. Time will tell.

I won't even mention the negative realism of this "innovation." Is it normal for an army to have been stationed in a camp for a month, and when the enemy approaches, they build fortifications in other places in 5 minutes? And regroup, and do many other things.

Tell me, what is the difference now between the attacking and defending army in Heroes 5?