To be fairly honest, I don't even think last gen can cope with anymore DLCs from destiny. It already had storage issues from TTK and another similar DLC is just not going to cut it. Even certain emotes aren't on last gen because of these issues. Even if you were to cut content, what's the point? Your just killing all of the amazing experience of destiny. You really don't want to experience the full thing? I'd doubt the raid would make it if it was coming to last gen.