I personally wouldn't over complicate the mobile version, it's pretty close to perfect now in terms of complexity.
It would be nice to figure out a means of adding manual tuning for the nav instruments, obs etc. Shouldn't be impossible as X-Plane9 mobile had it years ago. And it's being added to XP10m now allegedly soon to be in beta.
As far as control of every cockpit lever? No that would be too fiddly for mobile and should really stay the preserve of PC.I would like to add joystick support for AF2 mobile builds. It's great for at home when you want a little more control. It's already in Infinite Flight, and is being added to XP10m after this next beta phase.
Other than that - mobiles already awesome. (few bugs aside).
I'd keep adding saleable content, on a regular basis or at least several times a year like new aircraft and scenery if possible. This would keep fans happy and generate regular income for ipacs.
This is exactly how I feel.