It would be logical to make the last part consist of at least 8 campaigns, so that you can play for each race, level up the heroes yourself, and not get them at the end with a set of useless skills and spells. Each player has their own favorite spells, some like light and some like dark. I would like to see the opinion of other players.

You could complete the campaigns for all the story heroes and all the races in Hammers of Fate and in the original game. "With a set of useless skills" - the skills are normal, the battles are completed without problems (difficulty level - Hero), besides, Kujin, Wulfsten, and Frida are leveled up by the player.

In general, the last part is clearly weaker than the previous ones. The orcs are great, but that's not enough.

How is it weaker? They didn't let you level up Ilia? (although she only has one battle there). And in terms of new features, Tribes of the East completely surpasses the previous parts.