But, I'm sorry, this is NOT Heroes! And I sincerely feel sorry for those people who, for various reasons, started their acquaintance with this wonderful game with the 4th installment.
Heroes is about upgrades, it's about all the creatures in the castle being buildable, it's about a hero-commander, not just one of the units, it's about the good old characteristics of "attack-defense-spells-knowledge."
P.S. And I can criticize the 3rd installment, even though I like it.