The reason why they got rid of them has already been discussed at nauseum. A very large part of the population has been begging Bungie for years to bring back old D1 raids, and for the simple point of maintaining a manageable size of the game, they had get rid of some thing. Obviously, not going to be popular, but just because you paid for them doesn't mean you get to keep them indefinitely. I buy vegetables, I don't eat them, they spoil, I paid for them, but they're useless now. While I personally miss SotP and CoS, I'd rather see them come back as nostalgia raids - absence makes the heart grow fonder