Well first of all, the A-3 had engine problems. It overheated and was unreliable at times. And it was a minor minor version, numbers-wise. Sure we could use an early one, but I just wanted to point that out. You might get decreased engine ratings to simulate the engine problems. Said engine problems were fixed in the A-5, by extending the nose 6 more inches, or some such distance.
Why would you want the A-6? For simple firepower reasons? Bah! The A-5, if I remember properly, was far more numerous, and they're both going to fly the same, so asking for the A-6 is basically just asking for better guns in the A-5 (and then we get into the whole "LW guns are porked" "are not!" "are too!" debate).
No reason for an A-9. The advantage would be minimal to say the most. They were relatively scarce and very late war. If they're rare and almost identical to a 190a8, just put the a8 in and have done with it!
As for scenarios and setups, there is little to no reason to include an F-3 unless you want limited ordanance and weaker performance from the F-8. Keep in mind that, while slightly heavier, the A-8 had a stronger engine than the A-5, and seeing that the F-8 is a re-winged A-8 (with slight modifications here and there), you'd essentially get a less powerful plane. For most scenarios the fully loaded F-8 is still a sitting duck, and replacing it with an F-3 wouldn't help much.
The 190s did have a lot of different weapons packages. What were you thinking of? We recently got the panzerschrek rockets. I think HTC would be open to adding more options.
