Heroes V: Seventh Dragon Era

I don't think the idea of alternative buildings is that great. In reality, there are already alternative upgrades that fulfill the need for variety. It would be really cool if each faction had a new building added, where you could hire a new special unit, for example, leprechauns for the Elves.

I don't understand something, how is your idea different from the alternatives? So that you can build EVERYTHING, without replacing any buildings? And then what would be interesting...? An alternative is when you choose creatures and corresponding buildings to suit your play style, or for a specific map... well, like in Heroes 4, I don't remember very well, but for example, you could build creatures - wolves, or an alternative - elves, some good archers, and wolves, for example, something else good... and the player chooses what suits them best....