Mouse sensetivyty in Blender

How you working people???

  1. Some parameters changing normal with shift and ctrl, but most parameters like lamp strength, size changing by mouse extremely high shift+LMB give 3-10 unit when the same manipulations on roughness of color give 0.01-0.05 unit. In othes softwares same operations give the same result.
  2. Maya navigation. When I try scale object in 3 axes by direct mouse on small circle in center and move cursore I cant`t scale in small values becouse cursor too close to center object. Maya navigation lost some tools in menus. For what has been done maya navigations if we have so many troubles.
  3. Too much sensetivyty for rotation, zoom and move in viewport.
    Need to add some parametres for changing this values in preferences menu.