Currently, there are a few points of using it over Ki-84 Ko: 4 x 20mm cannons, slightly better climb rates, just for variety out of boring flying in the same plane. Otherwise, it’s worse than Ki-84 Ko in every way despite being in the same BR: way slower, slightly inferior full turn time, densely webbed reflector sight (could possibly lose what you’re aiming at), inferior bombs (2x60kg vs 2x250kg).
I saw in WT wiki that it could be armed with a pair of rockets, so why not? Give it some differentiation and preference choice why you should pick this plane.