Me neither.
I think the advantages of his death are not that great, in that it will not stop Al Qaida. The shouting represents a propaganda scoop more than anything else, and is not without its back draws.
I belive that if that was possible, they would already have done this.I expect there will be attempts at reprisals by Al Qaida, which will no doubt result in even more innocent deaths. I suspect that his capture would have been worse, though. The terrorists would likely have taken hundreds, even thousands, of hostages in an attempt to free him. And they would not have hesitated to kill those hostages when the government refused to release him.
I fear that it will make him immortal, in a manner of speaking, since there is now no actual evidence of his death.And dumping his body at sea is brilliant. No relics to enshrine, no grave to turn into a mosque. His body will be forever lost and as food for the fishes will finally serve some useful purpose.