As seen the other day during the relaunch of the Kirby site, it is very easy to forget to deactivate the debug mode when going live. Remedy could create here if you could control the config file from the panel. So everyone could integrate a simple toggle field in his panel to activate or deactivate the debug mode.
It is one of the few things in our agency that I always have to do, since my employees do not have access to the file system. A simple option would solve the problem easily.