I am in the process of a fairly major redo on the settings.  I am working on issues 100 through 103, and 32.  I just posted 2.8.0 beta on the downloads page.  It is ready for basic testing.  It still lacks some translations, the old settings still show up in the preferences (but no longer work), and I have a few other issues to work through but the basic functionality works.  I have moved many settings from the preferences (global) to instead be configurable per device.  I also changed several settings from radio selection to slider bars to get more tunable control to the user.  Since there are now so many settings, I changed the function of the back key to now save and exit instead of cancel and exit.  I added a new cancel button at the bottom of the settings.

Here is a preview of the device edit screens: