There are only 6 skills initially. There are 8 only if you check the box when starting the map. I don't see any problems.
I don't like the system of assigning certain skills, as well as the lack of native faction skills for many heroes. For example: Dark Elves don't have their skill "Irresistible Magic," which shows the element (earth, water, fire, air) that creatures have when they level up; Elves don't have "Avenger," and so on. Without this, the game becomes more difficult, which I like, but it also eliminates the whole point of choosing a hero from a particular faction, because you can level up a human hero, give him a Dark Elf army, and he will fight with them just as well as a hero who is a Dark Elf. And, in my opinion, this is a big drawback that diminishes the interest in playing.