Inconsistent size for the "spheres" used in different elements
The switches are composed of a "sphere" that is bigger than the "sphere" used for progressive bars and radio-buttons.
Expected behavior : the sphere/balls used in switches, progressive bars, radio-buttons, to indicate the selected day in the top-bar Calendar, to indicate a color marker in Gnome Calendar, and to close windows in the Overview, should all have the same size.
(1) other than the fact that there’s no apparent reason for the use of different sizes for spheres/balls; (2) a certain size is, in theory, better than another (i.e. in comparison to the size of the remaining elements of the theme); and (3) the theme would also look generally more consistent.
I should also precise that, in iOS, the spheres used for progressive bars have the same size as the spheres for switches.
Please, also have a look at this image concerning a size comparison between spheres for switches and radio-buttons.