NHF – new heroes for Heroes V 3.1.

What about the skill drop rate?

Well, yes, but the balance... To be honest, even in the original, it's difficult in this regard, and increasing the variability threefold? It would be okay if it were doubled, but threefold is definitely an exaggeration.

And also: there used to be an idea to give each race (specifically race, not faction) some kind of bonuses.

For example, Djinns (Jalib, Nur, etc.) would regenerate mana on the map faster, etc.

Well, that's cool!