Being able to get White Ravens after the Dalamud storyline would be really stupid. Nael was created specifically for this storyline (where he first showed up as a GM-NPC) and so anything involving him will disappear along with that storyline. Hoping otherwise is kind of dumb. The earring itself will probably not even be that good in 2.0 so it's basically just a trophy for people who are able to beat him with 1.0's battle system.