I would like to see a huge improvement on the Flight model for the newly added aircraft.
I have a lot of experience and time with DCS World (Mostly A-10C) and some real world aviation experience. I find the two new aircraft, while exciting, lacking a lot of realism and general performance issues.
I mostly find the power and weight ratio very off and exaggerated with the A-164, the turn rate is much too high (especially on full load) and not nearly susceptible enough to a stall.
Going in for a gun run or a dive seem to have an odd effect. The aircraft seems to be on "rails" and not responding to how it would in real life. I would like to see realistic effects from the external environment. Pressure, altitude, wind, temperature, humidity, etc all play a role but as it stands in Arma 3, it feels as if we are flying around in a air tight bubble. Not all the effects need to be added but a lot of tuning needs to be done.
The aircraft should also reduce speed rapidly and "nose up" while firing the main cannon. The aircraft should also nose up naturally during a dive without direct input with the size of the wings on this model (large wings = lots of lift).
I hope you're willing to put some time and effort into your flight model, as it stands now this just isn't good enough for those who want to act in the fixed wing CAS pilot role.