MMH5.5 - Heroes of Might and Magic 5.5

I understand that this might be more of a personal preference... but:
I suggest bringing back the "necromancy" from "Heroes" into the game.
That is:
so that a necromancer could only raise "skeletons" (the fact that the first level of troops was always a feature of this faction)
Maybe when a hero reaches level ~20 and has 7th level monsters, they could raise "bone dragons".
But levels 1-6 monsters - only "skeletons".