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A couple more comments have emerged.
1. The hero's Biography is not specified. In the default presets created by the editor, it is not written, although the original character name is indicated.
2. Sveyya turned out to be a frankly weak hero: a "hero-caster of lightning without mana." It would have been possible to give her the Ring of Sar-Iss. Even with it, she won't achieve much.
3. It would be better to take Armageddon away from Railag. His specialization is already overpowered, tailored for Campaign mode, and he has a strong army, many artifacts, and spells. Why does he need Armageddon too?
4. Zehir. There is an opinion that the hero could have been given more starting troops. After all, all the enemy needs to do is destroy the starting units, of which there are only 5 and they are not numerous. No amount of dancing around and summoning phoenixes/elementals can save him from a quick defeat. And Kujin, who appears from around the corner with her army and TRIPLE damage to summoned units, makes the poor Zehir sad.
It seems that some heroes lack "personality."
For example, Faydaen is just Ossir, but viewed from the side. And his "specialization" is easily circumvented.
King Tolgar is a hero with a cool set, and that's it.
Nicholas - when you first see his army and abilities, you involuntarily exclaim "Why not Lucretia?!" The vampires simply lack the attack and defense stats of Lucretia to effectively heal, and while the hero is slowly casting "Shield" and "Skin" on them, they already manage to lose most of their forces. For some reason, the "Stone Skin" perk was not taken with fully upgraded Defense... It turns out to be a kind of necro-version of the vanilla Jhaliba - he also resurrected and resurrected until he overdid it.
And Shadia with her Earth Magic and Defense. On the one hand, it's original, a kind of classic mage, but if you look at it globally, she is indistinguishable from the same Sinithar-Railag, who also have the same spells and enough magical power.
I agree with Trolololic's comments - they are fair. Are these improvements planned to be implemented in the mod?