One thing introduced in the latter half of Version 1 which I think would be fun to introduce again was the unexpected, funny/scary dream sequences.
They weren't included in the patch notes, but after you passed certain land marks (completed a specific hildibrand quest, shut down the satellite uplink in whatever Castrum that was etc) then you had a chance of logging in to a dream sequence or a cut scene.
It was something that jarred you out of your routine. Really took you into the world.
Imagine, a week or two after you down Thornmarch (Hard) you log in, your character wakes up to find a moogle floating over his head, threatening or apologising or whatever.
Now with linky goodness