Well, so far I tried to gather some actual Data about what is actually Better between Sliders VS wheel.
Ultimately one can argue it is all based on opinions and playstyle, but there are a few things so far that I can pretty much put up as Facts.
*If someone considers one of those to not be true, please object*
1.Sliders are faster and easier to precisely dial arbitrary sets of asymmetrical values. ( ex: 22%, 34%, 44% )
2.Wheel is faster ( and arguably easier ) to dial Symmetrical sets of values. ( Ex 40,40,20 ) or Polarized values ( where one is 0% )
3.Fine tuning to exact values is harder on the wheel due to minute and precise mouse movements requirements.
4.While setting exact values on the slider is purely mechanical work ( Set first value, Lock, Set second value, Done ), doing it on the wheel requires actual thinking and some brain efforts to compute where you would need to put the dot. ( I actually like it, I see it like a mini-game, but can understand why some people would see it as a problem )
5.If someone uses the same presets over and over in the game, The wheel becomes very efficient as you can memorize where to put the dot for each of your favorite presets and set the wheel in an instant without even thinking. With the sliders you still have to go through the steps described in no.4 and it takes longer.