I don’t think the type of joystick is relevant. I think it’s the flight-model that’s broken. I think what people are doing is altering their joystick “sensitivities” to “work around” the sensitivities in the flight model.
Here’s why I think that.
If I leave the linear graphs in the sensity adjustment then I see that I get the full range of control surface deflection on say a C172. Joystick in the middle, I see both elevators and ailerons centred. If I push my joystick full forward, I see the elevator in the full nose down position. Full back and it’s in the full nose up position. A similar situation is seen for the ailerons. The sensitivity graphs show a the full deflection of my joystik in a nice linear fashion, and in the game this is mapped onto the full range of deflection of the control surfaces. Exactly what should happen. So I shouldn’t have to adjust anything…if the flight model is right. If the flight model was right, I’d be able to fly it now exactly like the real thing. Except I can’t.
Conclusion: it’s the flight model that’s wrong.
Further evidence is provided by FSX. Here, I’m flying a PA28 and I can fly it nicely with my joystick. It, seems to me to fly in a way fairly similar to the real thing - and I’ve flown a whole range of different types of PA28 in the real world.
Back to FS 2020 and the C172 is super twitchy. In my opinion, the real thing just doesn’t fly like that and FSX, which was becoming a half decent simulator, has become more of a “game” in FS2020.
In my opinion, what everybody is doing, is tweaking the sensitivities as best they can to work around the questionable flight model in FS2020. Sure, you can do that, but even then, I don’t believe you end up with anything as close to the real thing as FSX was. Of course the graphics are nicer, but for me I’d really like to be able to fly a C172 or PA28 and find it behaves close to the real thing.
Is that a big ask for something that claims to be a “simulator”?
This stuff about dead-zones and “micro-signals” from the controller, simply shows the auto-pilot is bust too. Real planes don’t have dead zones, and in my experience of light aircraft, no two planes are identical anyway, depending on how many dents they’ve got etc. (!) My club has a PA28-180 that always used to pull one way with the controls centred - but you just trim it off. That’s what any decent auto-pilot would do. It shouldn’t matter that the controller is returning a non-centred value - the AP should just use trim to negate it as part of the feedback loop. If you watch APs they are often continually adjusting the trim.