But the Magic Fist and Ice Block really have the same effect and differ only visually, and that's what, in my opinion, needs to be changed.

And how interesting would that be? Maybe we could make one spell that deals direct damage, and the rest of the spells could be something special? For me, from the point of view of the spell system in Heroes 3, practically nothing has changed with the arrival of Heroes 5, no matter what they say. Almost everything is the same. For example, the Power Field was simply renamed to Secret Crystal, and the Wave of Death was renamed to Unholy Word. The system itself remained the same. I don't know how the developers of Heroes 6 will come up with ways to "move away" from the established system (and who even said that they are going to move away from it? I personally haven't heard). But I wasn't talking about that. I was saying that there are too many elemental spells and too few of the others.

Added 3 minutes later

So maybe we'll have to learn one spell at a time :(.

What do you mean by that? 1 skill = 1 spell?