Aside from the various FC buffs, and accessing Diadem as a group... there's really nothing FC's provide in this game. Any kind of activity that an FC can do either is something that can be done without one (maps for instance), or various other activities that, again, an FC is not inherently neccesary for.

Too many times has it been said about how so many "dead" FC's can be, and that it's "up to the players" to find fun within the games systems. Maybe if there were more systems for guilds to use to take advantage of, ya know, existing and working together, these issues wouldn't be so bad.

Compared to what I've seen in other multiplayer games that have guilds, they offer way more than XIV does.