Could you imagine what would happen if all Oceanic Flight members had miracously survived the plane crash? The would of easily have taken over The Others, found out like everything about the Dharma Initiative and mysteries of the island and could've overpowered the mercenary team. Of course some would die from the Others,the smoke monster and etc. Even with the time flashes and flaming arrow attack there would still be at least 50 of them left which could've seriously helped the Oceanic 6 when they came back to the 1970's. Then they would still be alive when Ajira 316 survivors came. Then there would be conflict and Ajira would lose due there limited knowledge of the isalnd. Then any Oceanic survivors left would eventually become the "New Others" because they would never be able to find rescue or escape with their importance.