No, I know what yaw control is, but this doesn't seem to be the problem. It's seems like it has more to do with the analog control itself. If I'm coming in on an approach, where heading is crucial, if I try to fine tune by nudging the analog stick a bit, the plane 'bounces around' on that axis. If I don't touch the stick at all I fly straight - so it's not any sort of outside force. If I keep very small amounts of force on the analog stick I can make a smooth changes in heading - but it just seems whenever I let go of the stick it starts to bounce me around. It just comes off as an artificial way to make the flying harder, and I'm not really about to pass off shitty controls as "WWII realism".
And here's another thing: it's too damn easy to stall a plane - especially the Mustang. I'm not saying they need to make the plane be able to turn tighter or faster, but they need to dial back the controls a bit. As it is now, pushing the analog fully in any direction is pretty much an instant stall - so why is it even there? Deaden the control and give us some more warning of an impending stall or something. I lowered the sensitivity about halfway and it didn't help the fact that full analog = instastall.