If Bungie/Activision ever wanted to engender good will with the community and improve the quality of their product, they would be able to do it fairly easily by providing The Dark Below and The House of Wolves free of charge and then commuting existing DLC and Expansion Passes to the next two items, the rumored Vex expansion and Forge of Gods. But they'll never want to engender good will with the community or provide a superior product. :D