You can move layers out of folders by ungrouping them. Holding down the "Alt-key" while clicking the "Group button" will ungroup the folder that is currently selected! Duplicating folders is something the dev team is looking in to at the moment! Let me know if you have any further questions!
What I find annoying is that to ungroup a layer you have to hold ALT, to enable / disable layer only in selected map you have to hold CTRL, for something else it was SHIFT. Its quite disorganized. Either use intuitive shortcuts to do alternative actions, or we need some form of a popup / alternative icons when holding CTRL…