We've always relied on the community's efforts to make Square MMO's playable, from early Windower to all the things Guildwork has brought to the table now, I have little hope that will change in XIV.

Shouts feature through AH/GW completely changed group forming in XI. I didn't have to say "let me know if you see xyz" to a friend, didn't have to sit in Jeuno doing nothing. Almost everyone uses it as well; you would get tells from people in all zones when shouting for a group.