The gear is a special case as it usually comes with a ton of different ideas to use. This set contains mainly objects, all icons follow this specification and all sizes follow those specifications too. So the improvement would need to be a change in direction.
If you're looking more for a gear which is for an option button or more for a schematic use e.g. for a GUI, you will find various gears in the current GUI bundle: https://itch.io/s/50215/2021-q4-pixel-gui-bundle