The Ki-84 is a complete deathtrap in the MA. To fight effectively it has to keep the speed under 150mph, which means it should slaughter WWI biplanes, but even the A6M2 should easily defeat it, though it can at least run from the A6M2.
Either the Ki-84 is the most overrated WWII aircraft, by huge, massive numbers of miles, or this flight model is a joke.
To even begin to claim that the Ki-84 as modeled in AH is effective is laughable. The N1K2-J is better in all ways except for speed at altitude and cockpit visibility, and only by a little in both cases. The N1K2-J is more manuverable, has much better firepower, is significantly more durable and handles highers speeds vastly better. The Ki-84, contrary to my hopes, weakens the Japanese planset for scenarios, not strengthens it.
We'd be better off if they hadn't added the Ki-84.