1. I experienced crashes (8GB RAM, AMD 4 * 3.3GHz, 2GB 5850, Windows 7/64). I found a solution somewhere here: increase the swap file to 24GB. Since then, no more crashes, and I've played through the entire human campaign, a single-player map, and three Hotseat maps. I didn't measure the FPS, but it doesn't seem to lag.
2. If you can't place or redistribute stacks, remove any stack, then click on the bottom left corner of its former location, and you'll see the "placement" option.
3. Text issues. After a victory, the "new level" message isn't visible, or something else. Guys, you're getting too demanding. Do you want everything handed to you on a silver platter?
Pros of the game:
Increased diversity/variability in the tactical aspects of battles
1. Flanking attacks with increased damage.
2. Many unique abilities for units.
3. Damage is divided by elements - fire, darkness, and so on.
Increased density of objects on the strategic map without sacrificing beauty
4. The maps are very rich, and there are now plateaus, like a 2-3 story structure.
5. Heroes. There are enough of them for variety, and there are no obvious losers.
6. Skill tree. Without it, it was difficult to understand what to do in the 5th part, but now it's built-in.
7. The "governor" skill is very good and adds variety, as you can increase the experience percentage, hero stats, and movement range on your own lands, and thus harm your enemies, etc.
8. The built-in encyclopedia is great. It has information about units and heroes, and beautiful artwork, in almost every location. It's beautiful. My daughter and I spent an evening admiring them.
9. There's a hotseat mode right away. In the 5th part, this feature appeared much later (I think).
10. Playing as the Necromancer, you can cut down on resource gathering and steal resources from enemies, which adds to the fun.
11. Magic. I like that they added spells that increase hero stats before battle, resource gathering, and this is on the strategic map (hello, Disciples!).
12. You can start the campaign with any race right away, which I don't think was possible in the 5th part.
Overall, it's clear that the developers have taken the "Heroes" series to heart and incorporated many of the good things from previous installments, if not all of them, plus many direct references to previous parts - for example, the heroes from Solmyr with chain lightning, Yog, the Dragon, Genova, or the feature of raising ghosts (which was in the 3rd part). The balance seems good so far, there are no unbeatable heroes, and this is despite the much more complex calculation of damage and turn order.
I'll write about the cons/shortcomings later