Theme switcher admin only access

Hi. I think I might have misunderstood some of the values of this plugin.
What I had hoped is that this could be used by admin only to build another theme replacement style in the background while displaying the original working model.
Not so.. You can not access the theme options of the other background theme without enabling it for all.
Also there is no admin menu access for it either from what I see.
Nice idea, but not quite as hoped for.