Too difficult to customize individual icons

[Mythological]

This may be more of a feature request than a bug but I did not see an option for feature requests. Anyway, what I would wish for is that if you right-click on an icon in the dock, one of the options offered is "change icon" and if you click on that it takes you to a file selection menu where you can pick an image file containing the icon you wish to use. Right now it is far too difficult to modify individual icons, also I do not see any way to modify docklet icons.