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Hello, while playing with this mod, I encountered some issues with the default hero models:
1) Deleb and Jezebel have broken movement animations on the global map.
2) Irina/Iris's head disappears during any combat animations.
In a build that I created from other mods, these models were used for these three heroes; they might be useful:

New heroes also had problems on the global map, in particular, the new Academy heroes who fly on a carpet actually fly on an invisible elephant, and you can see it through the carpet. And with the new Academy models that ride a horse, the horse flies out from under the hero when braking.