It's worth the money if you enjoy the game. That can be the same as Bioshock Infinite for example. The game itself I paid $60 for, but finished it within only a few hours played (split apart, not in a single day). I still see the game being worth the $60 because I enjoyed it so much. I think $15 for the DLC releases are worth my money. $15 isn't really that hard to come by or save up, especially if one enjoys Destiny and willing to pay the price for more content. All in all it just comes down to if you enjoy the game or not. If not, then obviously the price will not be worth paying, as you don't enjoy it.