The launch of Stormblood changed the quest requirement from the end of ARR to the end of HW. Your "New Adventurer" status will now last until you complete the level 60 quest "The Far Edge of Fate", the final quest of the Heavensward MSQ chain.

(The other requirement is 168 hours of playtime, but you've already hit that one.)

So yeah, even regarding sprouts as being new is getting a bit ridiculous at this point.