Regarding why he didn't die but resurrected, Sun Wukong wasn't surprised or confused. In fact, after he was defeated by the Primordial Honor, he remained conscious, aware of Ye Zi's arrival and everything that happened afterwards to save him. However, his injuries were so severe that he could only lie there as a spectator. Now, he has resurrected, and it's in an unprecedented peak state. Sun Wukong doesn't know his current situation, but he knows he's gotten stronger. It feels as though all his potential has been unleashed.