^Because it was very difficult to make a slider where the last point was properly in the middle of it. It was actually a very sloppy way to make sliders and this way is much cleaner and so there wont be nearly as many awful sliders. And really sliders that don't end perfectly where the last point is cause issues with distance snap, and other calculations. The new arcs is just a benefit to the new sliders. I'm sure we'll be getting more features that weren't possible because the other sliders were just unpredictable.
I'm not saying that the way sliders are is perfect, as the point can go far off the slider end and that can be unintuitive. If that becomes an issue then they can fix it, but for right now, new sliders are the way to go.
I'm not saying that the way sliders are is perfect, as the point can go far off the slider end and that can be unintuitive. If that becomes an issue then they can fix it, but for right now, new sliders are the way to go.