I would have been 'ok' (And I use ok loosely, the relic weapons seem pointless in general for all that hard work) with the introduction of new relic weapon if they actually revived old content.

Before you say 'But they did! people are doing old quests' Slap yourself. You deserve it. People were doing those quests all along. if not to protress Main Story, then to get minions/cards/roulette. It did NOT revive any 'old' content.

If they forced you to get something form the Coils of Bahamut, or Labyrinth of the Ancients...THEN they revived old content. But they didn't...they just rehashed pointless grinding.