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>>>Adding items is not required
>>And WHO made the STUDY to really tell if it's required or not???
>Is a study really necessary?
Not really, anyone not in denial and trying to defend a error would not need it, but for some it may have helped. It would have shown the real use for an menu editor would primarily be adding new entries and changing(editing) existing ones. Changing location or moving entries around would be the least used used functionality.
>if the app isn't broken, the user wouldn't need to add menu items.
For user in the real world this is not the case so handle it.
>Such as adding a launcher on the panel or desktop
The user wants it in the menu, deal with it.
>writing the app.desktop file and dropping it in to the correct directory
The user don't want to learn the correct syntax for .desktop files or bother with their location. Compare the usability to something like 2 minutes with a GUI menu editor.
>the correct directory(generally /usr/share/applications).
For normal users, surely not. ~/.gnome/share/applications, more likely.
Doing things like adding a selfmade xdialog/normal script, small app or adding/changing a application start-up parameter are some typical task. And the user are not interested in mucking about with .desktop files, that's why you have menu editors. A simple study of actual users would have told you so.