I see Zeros in LW. It is like those National Geographic movies where a school of fish are trapped near the surface and Late War Monsters are zooming through , leaving flakes of silvery fish scales where the fish used to be as well as causing those nice little roman candles we all see.
Those "trapped fish" get quite a few kills.
LWA Tour 154:
A6M2: 149 kills and 416 deaths. Kill Death ratio of 0.36
A6M3: 456 kills and 654 deaths. Kill Death ratio of 0.70
A6M5b: 3518 kills and 4023 deaths. Kill Death ratio of 0.87
A K/D ratio in the LWA of 0.87 for a flammable fighter that can't break 355mph in level flight is not bad.
The Ki-43 seems a great addition for scenarios though for MA another limited use bird that fits into the category of Custers last ride. The Raiden/Jack on the other hand should be able to compete with the Late War monsters. But that's just me...
Boo
The J2M3/J2M3a/J2M5 or Ki-44-II would be more LWA competitive, but I think you are underselling the Ki-43-II and, particularly, the Ki-43-III.