Heroes 5.5 WarGame Edition - Tactical Edition.

I agree with that; an entire class of units that are “allowed to do anything” is being removed.

So what’s so critical about that? It’s enough to simply not give such high speed to large stacks (like Hydras or the same dragons, as they are in the original). Then such a unit can be relatively quickly destroyed, and the danger can be eliminated (if, of course, the opponent doesn’t come up with a way to save it by blocking your archers).

or choose one thing

That’s a pity.