I prefer option three... or actually, I have an even better idea, have him lose an arm and a leg and as such be rendered helpless for the rest of his life. For an orc this would be even worse then death! He'd be like a madman yelling around how the Horde should do this and that with kids telling him "you can't even fight!" and throwing with apples at him, and at the end he bends and takes an apple to eat it because of the hunger. Forgiven for his crimes, but now forgatten by the Horde.
---------- Post added 2012-05-26 at 09:45 AM ----------
1. Is Cairne dead? Did Cairne die because of the blow applied by Garrosh? Yes to both, so Garrosh killed Cairne, not murdered.
3. Yes, he said "I wanted to KILL Cairne honorably"
4. But it was Garrosh who turned the duel into one to the death, was it not? And Cairne had a legitimate reason for challenging Garrosh, some orcs attacking his tauren and Hamuul telling him it was Horde orcs, what reason did Garrosh have for turning it into a duel to the death? His pride.