Why use avatar movements? That's like using an accelerator pedal with 6 or 8 notches instead of continuous movement.
Of course, I don't use the PALs either. Forget percentage. I wrote my own ruler. If the club hits 150 and I need to go 140 I want to know where 140 is. I don't want to know where 93.3% is. I don't want to know that my avatar needs to be in the next-to-last notch.
And yes, despite some posts to the contrary, it's suitably linear. Deviation, even when small, outweighs any non-linearity there might be. That's presuming that you choose the next longest club. I can't speak for using a 150 club to hit 20 yards.