Well, let's go through everything in order:
Graphics:
1) I absolutely didn't like that the game became darker; I would really like everything to be bright, beautiful, and fairytale-like, as in games 1, 2, 5, and 6.
2) The world has become flat; in game 5, you really feel that it's a living world.
3) Terrible ratio of objects (cities, mines, units, etc.); of course, it shouldn't be 1 to 1, but in games 5 and 6, everything looked much nicer!
4) Terrible effects.
5) 2D screens - :(
6) To put it mildly, the animations are wooden.
7) Half of the creatures and icons are reworked from game 6 :(
That's all about the graphics.
Skills:
Oh-oh-oh! The developers have given us a load of nonsense here!
1) They said they didn't want to limit the possibilities and therefore wouldn't make skill dependencies like in game 5, but (!) these idiots (honestly) made 6 (!!!) classes for 1 (!!!) faction! And none of the classes have all the skills! What a huge number of possibilities! + Half of the skills can only be learned up to the expert level!!!!
2) The number of skills for creatures has been reduced, and now they are all the same! And do you know why they did this!? NO!? They say that the large number of skills in game 6 prolonged the battles!!! I'm just furious! The problem wasn't the large number of skills, but the fact that the creatures had a lot of HP and a little attack and damage! And half of the skills reduced/blocked damage or resurrected creatures!! THAT'S WHY THE BATTLES WERE LONG!!
3) There are interesting and good skills, but half of them don't work!
4) The governor's skills don't work! In any way! Neither if the hero is the governor and is in a city with a whole bunch of special skills, nor in any other way!
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Just in case, I'll inform you that the governor's skills do work. You just have to figure it out yourself. The creature growth is not written as "base + governor," but the base value simply becomes larger, and the reduction in building cost also doesn't show the governor's merits. They just become suddenly cheaper. It's not necessary to stay in the city. It's enough to appoint him once, and you can go for a walk.
Of the things that definitely work: creature growth, the entire economy branch, Strength of the Land, Native Lands. I haven't tried the rest yet.
In my opinion, the graphic style is good; what I didn't like in the fifth game was the cartoonishness. Although they overdid it with the details - you still can't see half of it, and it causes lag.
The animations are really bad; this is obvious to everyone.
And regarding the skills - not counting the free skill points from some buildings, you really only have enough for 30 levels to fully learn 3 branches.