The A-9 wasn't some super-plane. It was an A-8 frame, had all the A-8 weapons rutsatz, the majority of them had the same prop and same tail (only some had wooden props and ta-152-style tail fins), but it had 10mph more on the deck.
It's even pretty hard to find specs for the A-9s performance. Some say from 355-360 on the deck, some say 359. Keep in mind our A-8 already in-game does 350MPH on the deck (clean).
Not really much of a performance boost. It will still turn pretty much the same as the A-8 does.
Of the 21,000-or-so (not counting Ta's) Fws only about 900 were A-9s.
Maybe the reason you'd like the A-9 is because our current A-8 is modeled quite a bit over-weight? It's almost 300lbs heavier than most documents list it, and this could be why you feel it's "piggish" -- because it is!
If we had some major weight checks on the 190 line, we probably wouldn't need the A-9 at all. The A-8 and F-8 are identical, for example, in climb, and speed, despite being 500lbs heavier (armor plating) -- which SHOULD reduce speed, acceleration, or climb rate, but does not. I think the 190 series needs to be rechecked. THEN we'd probably feel the A-8 is a bit more nimble, and the F-8 a bit more piggish.
