Future expansions.

To be fair, it should be noted that most fans are waiting not only for the Town (T.E.), but also, of course, for the Academy of Magic! But personally, I'm afraid that it, like the Elves, will undergo changes...

Yes, of course. Changes will happen. Ubi said that Gremlins, Gnolls, Trolls, and Kobolds will definitely not be in the game. So, there is already 1 vacant spot for the Academy.

And with the Emerald and Black Dragons, we will have to say goodbye.

Personally, I think that we will only have to say goodbye to the Emerald Dragons. Because, rather than this kind of Emerald Dragon, it's better to have nothing at all.

According to Ubi, the dragons were removed from the factions due to their dominance in the top 5 (half of the factions had a dragon as their champion).

In my opinion, the fact that some dragons have become bosses does not mean that there will be no dragon units at all. After all, Aribiban and Azkaal did not prevent the return of the Lords of the Abyss. Namtaru did not prevent the appearance of the Weavers of Fate. And the Mother-Spawner did not prevent the appearance of ordinary spawners.

And Marzini said in one of the Q&A sessions that there are factions that cannot exist without dragons. I think he meant Dungeon. After all, this faction has changed its name many times. It has lived in the mountains, in dungeons, in swamps. So many units have passed through it. And the only two units that have always been in it are the Minotaur and the Black Dragon. Remove the dragon, and the Dungeon will lose its identity.

The Ghost Dragon, by the way, also has a chance to return. In one of the interviews, Ubi was offered the idea of alternative champions, and Ubi liked this idea. The fact that they have not forgotten about the Ghost Dragons is evidenced by their presence in the Duel of Champions game and as a boss with the same name in Danse Macabre.

It would be logical, for example, if the Alliance of Light has the Light Creatures, why not make the Necropolis have the Spirits of Darkness?

If by Spirits of Darkness you mean Dark Elementals, then they would be more appropriate for the Dark Elves. After all, the Dark Elves worship the goddess of Darkness, and the Necromancers worship the goddess of Order.

If another model will serve two units at once, I will choke.

Don't choke! According to Ubi, there will be no more elementals in the new factions (apparently, one of the main reasons for the appearance of the Light Creatures and Mizu-Kami in the factions was their belonging to the female gender).

instead of COMPLETELY UNNECESSARY LIMASU, OR LAMASU??

I think the Lamasu were introduced into the game for 2 reasons:

1) After the departure of the Ghost Dragons, the Necromancers lost their high-level flying units.
2) Ubi's desire to see more women in the game.

In general, I personally have nothing against Lamasu. Ubi doesn't often introduce creatures from mythology into the game.

I don't like the idea of the Light Creatures.

The Light Creatures, in my opinion, were introduced for 2 reasons:

1) The need for game mechanics. Each faction should have at least 2 creatures with a magic attack, because hero-mages increase the attack of magic creatures.
2) Ubi's desire to see more women in the game.

Mages have been around since the 2nd part of Heroes, as have the Elves!

Elves were in the 1st part. As was the Warlock faction, which later became the Dark Elves.

Moreover, everyone is waiting for the legendary DRAGON hero with his unique ability to create Wizards from Mages!
As well as fans of the Elves are waiting for snipers.

I, of course, consider myself to be "everyone," but I am not waiting for a DRAGON hero. IMHO, there is nothing special about snipers that would make their return so desirable. Just a regular unit, with increased ranged damage.

Why not call them by their names? Stalker - OGRE-MAGE?

Ubi really has problems with names. They twist them in every possible way. But in Ashan, Ogres have not been encountered even once. Perhaps they simply don't exist.

And I'm curious, in the campaigns, are the mobs scripted on the maps, or are they chosen randomly?

I think some are scripted, and some are chosen randomly. If you look closely, you can see that before the Armageddon's Blade campaign, demons do not appear as neutral creatures on the maps (unless it is due to the plot). In Vyacheslav's campaign, there are no Nagas... and so on.

Remember Heroes 2, there was only one archer - a girl!

By the way, this is the oldest example of a unit changing gender! Here! Even in Heroes 2, a human unit was able to change its gender to female. So why are people complaining that the priests have been replaced by priestesses?