I meant that morale in 3 is much more convenient and understandable than in 4. For example: everyone is the same +1, 2 races are 0, 3 races are -1, undead are -1 and that's it. Tasty, cheap, convenient, absolutely peerless.

People fought demons, suddenly ended up in one army and NOTHING!!! Morale is "0", meaning they'll just get along peacefully :) A bit illogical, isn't it?

-no spells: fly and dimension door. Add them and life will be cooler.

Life will become more nonsensical. Is it really interesting to play when you don't have to break through guards and other things, when everything needs to be precisely calculated?
We vote for simplicity! Grab angel wings and let's go!

By the way, just for a second, imagine a hero in 4 with GM stealth and angel wings. Cool?
It'll be especially cool when he suddenly raids our lands :D

Regarding the downsides:
-all heroes are the same, without special abilities—this is just completely boring and uninteresting.

It's more of a downside that all heroes are essentially the same in principle, but that's basically a trifle :)

Yeah, sure, take ballistas or water elementals in your squad and then you'll see.

That's why people have heads on their shoulders. To think with them ;)

In general, variety, variety and more variety!!!

I gather 3 is more diverse?))
Because it has upgrades!!! And more castles! And... and... oh, I don't even know... a whole 4(!) schools of magic!!! That's cool!

-monotony of castles. All buildings (almost all) for all races are built in the same spot, completely boring, monotonous.

:D do you love playing the "find the dwelling" game?

As I already wrote, there is no Resurect (restoration) spell, well, not in its pure form. Guardian angel only for strong ones, call of death is not forever, and raising a corpse as a skeleton (or vampire depending on the spell) raises it not where the corpse is but near the caster, which is stupid, this skeleton will limp toward the enemy the whole battle.

Well, whatever about this resurrection, your prayers have been heard and it's been added in the mod. (imho for nothing :) )
But what was wrong with Guardian Angel and Call of Death?
The Guardian, in essence, is an alternative form of resurrection, with the only difference being that it resurrects immediately, or rather, prevents death.
Just turn on the game and see what... at least 7 angels (or even fewer) under this spell with about 6 charges can do, if there is a tactician in the army.
(Lars won't let me lie, but in our tournament game, such a squad wiped out his entire army, practically single-handedly :) )
And the fact that it's better to cast it on 3rd-4th level units is more a matter of logic, the spell is hardly to blame for that :)

As for Call of Death.
Let's imagine for a second that it works after the battle, i.e., everyone we "resurrected" this way would be preserved further on.
Now remember that Call of Death can raise ENEMY troops. We get the following: level up a death mage to 4th level of native magic, give him this spell, some starting army and go. NOTHING will stop him! Cool?

Having not 1 hero in a squad is good, but when there are 4 or 5, it's total nonsense.

You just don't know how to cook them (c)
Believe me, it's better not to waste money buying 1st and 2nd level units, but to buy an additional hero—the benefit will be many times greater ;)

.Campaigns. Well, remember the Her3 SOD campaigns, all campaigns are connected by plot, not like each next one is just new. And they aren't interesting at all.

If we are talking about the base version of 4, then even that is incorrect. General plot lines exist. At least the intersection of campaigns about Goldot and Emilia. The first has references to the second. I.e., the chronology is strictly observed. And also, there is no banal world conquest by demons\undead, campaigns are picked for every taste: there's a love story, one about knightly honor, one about becoming a queen (a rather large campaign), etc. and so on.

10. Barbarian hero can smash armies alone, that's already overkill, make it at least like in HerV where the hero casts magic and can strike with a sword and that's it.

That depends on the enemy army, far from any, and far from always :)
One barbarian hero definitely :)

P.S. Huge request: please don't criticize if you don't know how to criticize.

:D :D :D that's not even a comment.

And in conclusion, I'll allow myself to summarize the pros and cons you gave to 4.

Mainly, personally, I got the impression that you love running around the map with a huge powerful army in reserve, an overleveled hero, a book full of the most imba spells, and without breaking through any neutrals—simply put, you love feeling like the "father" on the map, I hope you play against at least medium-level AI :) ;)
And also, probably, you don't like to come up with things and plan, but only admire the variety of colored pictures and monster models.

4 turned out to be a bit harder to master, so you listed everything that made the game more complex as downsides, just take "dimension door" or "fly" for example :)

Seems reasoned :)

P.S. ladies and gentlemen, if the fun has ended here and a more... serious discussion of the topic is planned further, please signal me to remove the off-topic posts, of which many have already accumulated here :)