Huh? For all intents and purposes, Sun DOES think Jin's dead. Doesn't mean he is. I know there's been some confirmation about Michael being dead, but I haven't seen anything about Jin.
I agree. First, the main characters they have killed off have violated the island's sense of justice, and Jin -- despite his past -- is an island innocent. Second, they never showed us Jin's final moment. We got Michael's with his encounter with Christian. Jin unceremoniously disappeared in the explosion, which is very un-Lost like.