Auto-translated
I have a clear opinion only about Necropolis so far.
1. Upgrades with equal efficiency – I gather Warriors until I have 300-400 of them; they are tougher and easier to keep alive. Otherwise, archers are constantly being targeted:D. After that, I transform all of them into archers, because with that many, they are at least somewhat effective.
2. The new zombies are definitely better – they are tougher (and they are not attackers, but a shield), and their aura is more useful than the old ones' ability to inflict weakness on the attacked. The poor things don't get to attack that often:D.
3. Again, the new ones are better in terms of parameters. As for the abilities of both, they are not that important.
4. I am all for the old vampires – they are more reliable and combat-ready, and the new ones' sleep ability is a rather specific thing.
5. The new liches are great – although a cloud of old liches is cool, it's not always the case that the enemy stands in a tight group. But raising your own losses with a strong detachment of liches is very valuable, even a strong hero won't be able to raise as many as a detachment of 50+ liches.
6. The old ones are better in terms of parameters, but the new ones' ability sometimes works well; the result is that I still prefer the old upgrade. They are powerful.
7. Astral drakes are definitely more useful than spectral drakes, and I now use them. But the design is terrible!!! The thunderbirds just took the old model, desaturated it, and made it semi-transparent. Oh, designers...