Two recent open letters from Ayatollah Hosseinali Montazari and has effectively put the cancellation stamp on the Supreme Leader. He might still be officially the big cheese but he has lost all credibility already. It may be argued all day that all of them are the same, but the argument does not change the fact that this regime is collapsing within itself.
By the way, I could not bring myself to put a green cancellation stamp on him. Cancellation stamp is always red.