I'm fairly happy as is, but if we're making wish lists mine would be...
1 - Better Navigation screen, ability to set way points, or even VOR with tuneable OBS.
2 - Parking Brake.
3 - option to steer via device tilt with Manual rudder still selected.
4 - an additional camera option, same view as cockpit, but without the cockpit, mainly for performance reasons.
Trailing cam - no model, is similar but too far back and messes with my landings.
5 - gusting winds.
6 - random, or live linked weather.
7 - option to link time to real time for device location.
8 - pilot head lean slider - for cockpit view. This could be a slider top centre of screen, which would allow the pilots view to be tilted towards the sides of the canopy allowing a better view down the nose on planes like the Corsair.
9 - Failures / Rain / Cloud - all the usual.
That's features - I'd always like a new plane occasionally but tend to favour the props or the fighters personally.
You see constant posts asking, please add "insert airliner available in god knows how many other sims here", but I'd personally love to see some planes that really pushed limits at the time and which might not be as common, like the Messerschmitt Me 262, or Dornier Do335 or similar.
New regions - yeah if possible, but app/data size could become ridiculous, and if Aerofly1 scenery was incorporated into the 2 app, I'd be happy as is.