Regarding caravans, they are essentially transporting an army, so raiding them is like attacking an army.
I think that archers in Towers should attack based on the level of the hero sitting in them, or based on the number of armies.
And instead of giving 1000 experience points for Stones of Knowledge, they should give a percentage based on the hero's level.
I think we should bring back the four main elements of magic: fire, water, air, and earth.
In the 4th installment, there are even more changes, from combat to the movement of creatures. Although the Dungeon has become similar to the one in the 2nd game, so it's not a critical change for it, or for Humans and Mages, maybe even for Barbarians, since they changed in every part. But merging Necromancers and Demons is very noticeable, although if you build along a single branch, it's not that obvious. It's more complicated for Elves, since half of their units are new. The overall style hasn't changed much compared to the 5th installment. Everyone still lives where they lived (in terms of terrain), (maybe except for the Dungeon, but it's a nomadic Castle), and the story remains consistent.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!