Passing to design to think about. Also pinging @Deskana, @Ignazio and @DLynch as this seems very much related to https://phabricator.wikimedia.org/T196150#4265991 - some of the editors are better than others depending on circumstances. To provide a concrete example, no-js editor is far superior on a 2G connection at the time of writing from my experience.
The desktop prefs in http://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-editing have no effect on the mobile site, even if you use http://en.m.wikipedia.org/wiki/Special:Preferences#mw-prefsection-editing to reach that page. When T202921: Re-design the Editing preferences to make it easier to pick the editing environment that you want to use, it might be good to make that limitation clearer.