"Have I really left?" is more a philosophical question. In reality, once you take the red pill, you never go back. Your reinstatement effort was not an attempt to go back and tell an auditorium full of people how great it is to be back, it was trying to connect with people. That's over now.
I know I don't have to worry about you changing Halls, but that probably wouldn't work anyway. The original committee from your old Hall still would have to be the ones to reinstate you, and your going somewhere else would reinforce their thoughts that they were right about you while they assume you are looking for elders that don't understand why you are still DF'ed.