Can't really give any useful input until we know exactly where they're going with this, but personally if it's only a head-start on the new long-term weapon I wouldn't bother. As a reset, it's unlikely the first several steps will be any kind of crazy to complete. Skipping a few hours/days of expansion questing definitely doesn't feel worth burning a huge amount of time/gil for a zeta from scratch. Of course, the other side to that is they could pipe up at the end of next month and go "lol nm the relic quest is continuing directly and there's no new quest weapon or shortcut to jump into", and you'd end up scrambling like mad to finish. They need to stop treating information this important like a state secret and explicitly explain what's in store.