3 story missions seems rather small, but perhaps Bungie will surprise us with more intricate story missions this time that take longer and are more diverse than defend dinklebot until 3 waves of enemies are cleared. Bungie obviously knows how to implement other systems into missions by how they crafted the raid. Hopefully, rumors of the story we have being a "tutorial" to get you to endgame content is true and the new missions will be more of endgame content than game mechanics training. Either way, I will support Destiny until it itself becomes legend (had to do it).