About rudders in turns: here's how my instructor explained it to me. In a turn, it's definitely a function of aileron, left or right. However, imagine the diameter of the circle your plane is describing. In a left turn, for example, your right wingtip is moving faster than the left wingtip by virtue of being farther away from the center of that circle, so the right wingtip wants to get ahead of it mate, which rotates the airplane around its vertical axis. That causes the nose to drop and the plane falls inward. The cure is to apply some opposite rudder to keep the nose up.
I've never tried your method of using the rudder as the primary way to turn, tho' I imagine that, like a boat in the water, it will bring you around. But if there's somebody on your six shooting, ailerons are the way to go.
I'm using a Logitech 'twist' stick because my beloved Sidewinder disappeared somewhere in a move, and I find it so frustrating that I check 'Auto-Rudder' in the Workshops. In a diving left turn, the stick has to move on two axes, and I find that keeping that constant while adding 'twist' is damn near impossible, and I'm all over the sky. Auto Rudder cures that. However, in the few Multi-Player sessions I've been in, I seem to have full rudder control again. I guess Workshop settings are determined by the person hosting the game, so a set of floor pedals are definitely in my future. Which ones remain to be determined.
One place where your rudder control is invaluable is when you want to fine tune a shot. Assume your target's in a gentle right turn. You're swinging in from behind to get on his tail. The two of you are flying two different circles that have to intersect. Assume again that's he's staying just a bit off to the right of your gunsight. Instead of increasing your bank [which changes your whole circle] just tap some right rudder and the nose swings over and take the shot. Another place where the rudder is invaluable is in strafing ground target. You can fly a straight line [like down a road with trucks] and by lightly tapping the rudder left and right you can hose the area and stay on course too.