I guess I was actually hoping to get responses saying "Nah, using the twisty joystick is fine"
I can give you a "it's fine" response if you want. It would be "fine" in sense some native English speakers (and used car salesmen) use word "fine", i.e not good at all but still better than horrible.
I use a twist grip joystick, a real el cheapo of joysticks Saitek Cyborg X (aka MadCatz Cyborg F.L.Y.5) and it's one bang of buck. I did have to replace it with a new one of the same model (but some minor modifications that have been done along the years, new one being of tighter tolerances). The old one was loose to begin with and only got worse in use probably because of me playing IL-2 with it and not actually being very soft-handed with it. Some people could actually qualify the way I used by old stick as "physical violence". Actually, I might call it such as well (I'm going to be more gentle with the replacement)...
Anyway... it did take months to get used to the twist grip at first (back when I first got the old, now retired stick) since I had use non-twist grip joysticks before: I often inadvertently twisted it while doing a bank or while pulling the stick to raise the nose on final / flare. It was very restless and I even tried to fly it with the twist axis disabled (using keyboard rudder) but returned to twist grip. Over time I got used to it and I no longer inadvertently twist it when I intend to use only ailerons and/or elevator. The problem of precision still remains as with twist grip, I cannot really control the precise amount of rudder. Also when I have twisted it, I cannot really know how exactly much I'm applying it... that combined with FSX's buggy sideslip indicator ball and as result I cannot be certain I'm perfectly coordinated through the entire turn.
A non-twist grip joystick would be better in aileron and elevator precision too as there would be no free play due to twist potentiometer bearing tolerance. The adjustable handle of Cyborg X / F.L.Y.5 (while it allows customization to perfectly fit any size of hand) also creates another, cumulative free play for elevator axis.
I'll still stick to my twist grip stick because it's so incredibly compact. And because a twist grip joystick is cheaper than a proper non-twist grip joystick... not to mention rudder pedals alone costing four times as much as the joystick with built in rudder. But mainly for space considerations. Considering the time I use for flight sims (combat and non-combat variety), a couple hundred euros wouldn't be a huge investment for the increase of accuracy of rudder input. The space consideration is a bigger issue to me.
Just noticed this topic was on Piper Cub board. I don't fly the Cub. But it's not like B-17 or P-40 are that much easier on the rudder. The latter requires accurate amounts of rudder on take-off to not swerve around like a headless chicken, while the former requires precise rudder to keep turns coordinated (and full right rudder on take-off to counter the force that tries to pull the bomber out of the runway to the left). Spitfire requires rudder on take-off too, but it's not as restless as P-40, and unlike B-17, it remains almost perfectly coordinated in turns with just proper application of elevator. I'm sure I could handle the Cub "fine" with twist grip as well.