Promiatey
I've played a bit, and I have a question: shouldn't the first two tiers have their speed increased slightly? Because at the start, they are very slow; I don't remember any other factions having units that are so slow in the first two tiers without ranged support. Even the Necromancers have skeletons running around the battlefield, but here, both tiers have the speed of a corpse. Although the first ranged units appear on the third tier, they don't really help much at the very beginning; there are too few of them, and their speed bonus doesn't save the situation. Plus, there's not much support from the hero without magic. In the case of the Barbarians, Centaurs and fast Goblins helped.
Overall, it feels like this Castle is much less imbalanced than the previous ones. All the imbalance is in the perks related to blood; as for the creatures themselves, they are just creatures, some of them are a bit stronger than others, but they don't completely dominate their tier.