I'm one of those who has all the sliders lined up right across the top, for all my controls. I personally don't like any scaling at all, as I feel it leads (me at least) to training myself to overcontrol. I tried it, and found it be detrimental to my flying.
Basically, the scaling makes your stick less sensitive at low throws, but still gives you full deflection at full throw. That means your stick is mushy and insensitive near center, but gets more authoritative/sensitive as you near the limits of your joystick throw. So you can (and must!) move your stick quickly near center for small inputs, but must slow down your inputs as you give more stick. A small movement near center gives very little effect, but that same small movement with more throw will give a large effect!
IMO, it leads to less refined control across the whole range, because the amount of control you will be inputting varies. A 10% movement of your stick won't give you 10% additional control surface throw. It'll give you less than that at first, but more than 10% later. How can that be a good thing?
Sounds like a great recipe for frustration and nose bounce to me, but that's just my opinion...
By putting your sliders all up at the top, 5% stick throw gives you 5% control surface movement. 25% stick= 25% control surface movement. 75% gives you 75%. Pretty simple and straightforward. Need a little throw? Give a little stick movement...
By putting your sliders on a gradual scale, a 5% stick movement might yield a 2% control surface throw. A 25% might give you 10-13% throw. 50% will give you LESS THAN 50%. Great, you can (and must) move your stick rapidly with little initial effect. Now what?
Now, when you need "just a Little more", you're going to get a LOT more instead. That's because 100% stick is still going to give you 100% control surface movement. So at some point you need to make up for what you've lost, and that means that at some point an additional 25% stick movement will eventually give you MORE THAN 25% control surface movement.
When is that likely to affect you? When you have medium-high control surface throw (as in a slow stall-fight, especially when you need just a bit more elevator to get a shot, but not quite so much that you break over the edge and stall). That's precisely when you need fine, predictable control, and (thanks to scaling) precisely when you WON'T get it!
It may work for some people. I guess I see it differently. If it works for AKAK, I see it like this- AKAK is able to get decent control even though he's handicapped himself by scaling his stick. Maybe that's not a bad thing, especially for me, hehe! I see it a lot like I see Stall Limiter- best when I don't use it, and the other guy does.
Again- I freely admit to being opinionated.