I'm sure a lot of people would agree with me but try how I might, I'm finding it more and more difficult to enjoy this game due to lack of content.
To sum it up: There needs to be an inclusion of epic quests, for both combat classes and crafting classes.
Some examples that I think would spice the game up a little:
Treasure hunting. For God's sake, I'm getting tired of only killing mobs. Give me the option to go find some epic loot already. I'm hoping that with the inclusion of notorious mobs that we will start to get some rare items like in FFXI.
Sieges. Behests and dungeons are nice for group play, but I want a good old fashioned castle defense or battlefield scene. Something that would really stress player co-op and blow peoples minds.
I'm hoping We'll actually get to make trips into the Garlean Empire in a later expansion. Stealth missions ala Locke in Final Fantasy VI would be awesome.
While the addition of notorious mobs is going to be good, I still want to see boss fights.
For crafters, it would be nice to see some large scale crafting. Wedding dresses. Airships. An Aldgoat steak that would tip over Fred Flinstone's car. Challenge us to make it bigger and better.
If anyone else has ideas for quests of this nature, please feel free to post them here.