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

Some people don't like certain minor details, such as repetitive spells, daily growth, and the graphics, or the choice of building upgrades for certain creatures. Personally, I find all of this acceptable, but I don't like how the hero performs on the battlefield, and I'll explain why now. In the fourth installment, the hero is just another warrior, like all the others, except there's only one of them, and this warrior is not always as strong as the other warriors in the army. Very often, there are extremes, for example, either the hero is one-shot, or, conversely, he single-handedly wipes out entire enemy armies. Although both the army and the hero's strength grow as the game progresses, the army generally grows faster, as there can be several cities and external buildings where you can recruit an army, while the hero rarely exceeds level 20-30 in a single map. Yes, there are stat boosts, artifacts, and wisdom trees, but the army generally grows faster, although, as I wrote above, the opposite can sometimes happen. If we take similar games, turn-based strategies, such as Disciples or Age of Wonders, then the hero is also present on the battlefield, but one warrior is one warrior, and not a figure of one warrior with the number 1000 above his head. In Disciples, a maximum of 12 warriors participate in the battle, half of whom are enemies; in Age of Wonders, up to 56 people participate in the battle at the same time, but in any case, defeating several warriors or even several dozen warriors looks more realistic than when a barbarian kills several hundred gnomes with a single kick. So, what can be done? There are two options. The first is to make a formation in which the heroes are protected by troops and are completely invulnerable, except for spells like Armageddon and poison, but there is 100% magic resistance against them. The second option is like with the gates: they have only 150 HP, but you can only remove a maximum of 50 with one hit, which is logical, because there can be thousands of soldiers in the army, but only a few can fit in front of the gates and attack them at the same time. Thus, the second option is to make it so that the hero can be attacked by a limited number of monsters at the same time, for example, 40 champions, 30 thunderbirds, 10 black dragons, and 20 of all other level 4 creatures.