What steps could the devs take to better the Open World in XIV?

[DPZ2]

An example off the top of my head:

You travel to the end of a cave and find a glowing sword in stone and a small plaque next to it that give some blurb about a cursed hero and a warning, interacting with it spawns what would probably be a F.A.T.E.

Once completed a ghostly hero spawns and talking to said hero rewards you with a job-appropriate weapon(scaled ilvl preferably) and a 30min buff that gives something meager like 5% dmg/xp while in non-instanced areas.

I see you, GW2 Hero Challenge-on-steroids. Even GW2 didn't provide such rewards.

We already have Vistas (how many people actually took the time to complete that?).