I’m still in my first steps with the game, but the tutorial mission starts you off with a barbarian army and I quickly got to appreciate the Trolls a lot 🙂 They’re strong, they hurl big boulders at the enemy… they’re very expensive, though.
The Hydra was a massive headache for me during that mission, I never got hold of one myself but whenever I encountered one it seemed like a massively overpowered scaly wall of doom that would trundle round and absolutely slaughter everything. I’m looking forward to seeing if the impression is the same the other way around… it’s interesting that you’re finding uses for units that you hadn’t originally realized!
The way that each class has one more unit type than you can fit into an army reminds me of Etrian Odyssey, in an odd way – I read that the director of the game chose a party limit of five specifically so that it would always feel you were missing something and want to experiment with new combinations. It’s also interesting that you get a morale penalty for having too many units of different classes – I think this is something I didn’t realize way back when I briefly played HOMM3! What that does is discourage you from stuffing your army with multiple fliers, or ranged units, or whatever, by reaching across classes.