Hamlet battles (was listed for early january by old dev team)
Ummm.... we already have that.

Rewards for all our surplus "bonus points"? (was promised)
That system is no longer in the game. Guild marks have also been removed from the game (effectively) and you can exchange what guild marks you may have for materia, crystals, or gil.

The ability to change hairstyles? (was promised)
You'll be able to do it once when we re-customize our characters for 2.0.

Team-crafting, like building an airship or giant cake (was implied)
No specific promise was made or date given, so the status of this is unknown.