I don't see why you say the Ki61 is good for BnZ... It does lock up at speeds. While it can dive faster than an A6M, I doubt dive speeds are any better than the N1K2. The firepower, the ability to zoom, turn, climb, are all greatly diminished compared to both Ki-84 and N1K2.
It CAN bounce other planes. It just can't do it as well as some others.