This discussion rides on confusion, which concerns the question I asked earlier on.. so what is the perk agenda? Are the perks assigned according to:
1) arena balance
2) performance balance
3) or, historical rarity??
....
The C-Hog seems to be 1) (20~30% of kills), a bit of 2) (four Hispanos + carrier-craft + supreme JABO), and 3)...
the Ta-152 seems to be nothing but teeney bit of 2) (supreme speed at supreme altitudes where nobody flies..), and 3)...
Tempest would be a mix of 2) and 1)...
What would the Ki-84 fall under then? 2) and 1)? ...
But, the suggested performance data on the Ki-84 only seems to present to us that it is something like a bit faster accelerating Spitfire Mk9 or, a more maneuverable La-5FN... perhaps a Mix of a Spit9 maneuverability/top speed with La-5FN low-alt flight characteristics...?
Would that combination of performance be enough to make people choose the Ki-84 over everything else, and make it necessary of being a perk aircraft?? In this late-war MA environment where La-7s, Fw190D-9s, P-51Ds and Bf109G-10s roam??
I really don't think so...
We'll probably see them very often, but considering the rarity of Zeros(utterly incompetent as a fighter in the MA environment, if not rare..) and Ki-61s, it would probably be a result of fans devoted to Ki-84, or Japanese pilots who finally got their hands on a reasonably formiddable plane.. rather than something that has to do with initially great performance(as in the case of the Tempest)..
I'm willing to bet that with the Ki-84 introduced, a part of the Spitfire fans would shift to the Ki-84, some of the N1K2 loving folk would also go there... but it won't in anyway need perks both performanc-wise, or balance-wise..
...
Now, what JB42 suggests, I think, is an entirely different matter, perhaps, almost irrelevant to current discussion. It's about a totally different perk agenda.. almost..
ps) But I do agree along some of the lines JB42 suggests.
I would like to see late-war aircrafts perked very lightly, (even more so than the C-hog... around 3~4 perks..).
P-51D, P-47D-30, Bf109G-10, La-7, Yak-9U, N1K2-J, Fw190D-9, F4U-1D, Typhoon 1B...
which would promote the use of each predecessors
P-51B, P-47D-11 and D-25, Bf109G-2 and G-6, La-5FN, Yak-9T, Ki-61, Fw190A-8 and A-5, F4U-1.. pushing the arena into a more "mid 1943~early 1944"-ish environment than now.
... but, this is for another discussion..