I love Sim mode but I do wish it'd let you do one thing...
Keep a target locked so you can track it more easily*. I'll certainly be getting an AV8ER because there is nothing more awkward than keeping that bloody thumb stick pressed down, trying to look around whilst also control the aircraft. In Over-G it was easy because that's all the right stick did: look around but yeh...
I generally dislike any function which forces me to press that stick button unless it's a minor function. Looking around, however, is somewhat key to survival.
Anyway, just my 2 pence worth there and I know any awkwardness I experience will be mitigated by the fact that everyone is pretty much on the same playing field with the controls.
*Surely it could be integrated without having to have the unrealistic highlighted target box around it?
Edit:
P.S
I quite like the P-51D so far. I find it totally fine to fly providing that I'm extremely careful with the controls.