mmmm, Kakashi odeeing? It´d be so funny to see that. Otherwise he´d have to follow Naruto closely at all times, as a sort of a Sancho Panza monk till the end of his days =D
if obiti deactivates his sharingan and kakashi gets it, then kakashi should be able to use it just fine and wouldn't have to cover it. I think he can activate it if he gets it in it's dormant state as he can activate and deactivate his MS.
Over the years we had people keep proposing the same thing over and over. Every non Uchiha and Hyuga has only use one eye why has Kishi has shown them with only one eye? Because thats all their bodies can handle. You can't have a person blindfold for the rest of their life until theirs a battle.