Reading this article by forbes kinda reaffirms the fears about content being locked away until DLC.
http://www.forbes.com/sites/insertcoin/2014/09/09/lessons-learned-from-50-hours-of-destiny-to-date/
granted, most MMO like games require a subscription and then the content roles out while you're paying, so it's not much of a difference. nevertheless, I do get the feeling that
a lot of areas were left intentionally empty to fill with more stuff later on through expansions. i don't have a problem if new areas open up, but populating existing areas after the game launches rubs me the wrong way. unless they plan to leave areas like the grottos completely empty of any reward or mission, in which case it'll still be disappointing.