Vulture said:Two words... GRAND STRATEGY... as opposed to a tactical sim.
HOI isn't a Grand Strategy game, based on the scale of the units involved (Divisions, single naval units) it is Grand Operational. There is way too much detailed management involved for it to be Grand Strategic. Paradox can call it Grand Strategic, but that doesn't make it so. That is part of the design problems, especially with playablility. Much of the design focuses on the details, when it should be focusing on "Grand" issues.
EuroFront (Columbia Games) is closer to Grand Strategic, and it uses Corps/Armies and hexes; but even it is Grand Operational, as there is a lot of detail involved in combats, and moving of units.