Its superfluous because it would be the hands down most maneuverable aircraft, a title that's already held by a similar Japanese plane, the A6M.
It wouldn't fill in any gaps in special events that can't be reasonably well filled by the A6M. Its weak firepower would make it less popular in the MA's, and pure maneuverability isn't enough of an asset to counter that issue (as is evidenced by the rarity of A6M's outside of CV battles).
So while it would add something new, it wouldn't add anything new that can't easily be countered with a speed advantage. If it was a new jet, that kicked the speed up to 600mph from 550, then I would agree it would be significant in AH.
@ Karnak: So? My main rides will still be about 50mph faster, dive better, climb quicker, and last I saw, hit approximatly 15 times harder. And thats just on the deck. At alt, I'll be about 75-100mph faster. Its advantage will be of dubious value, becuase it cannot dictate the fight. Most aircraft will be able to engage and disengage at will, and even planes that are notorious for being bad at diving (such as the Ki-84) will be able to dive away.
So my response is this: so what if they don't add anything new? Its nearly guaranteed that they will be of more value in the typical MA fight.
Right now, the main argument for the Ki-43 is its historical significance, as it doesn't fill in the most urgent gaps in special events, and will be out-preformed in the MA's.
My bet is that when they finally do add the Ki-43, you guys are going to freak out and jizz your pants, fly it for maybe a tour at most, and then drop it when you get frustrated with the lack of speed and firepower.