I think they are seperating the paths because they are dropping last-gen. Bungie has already said that 2 of the old raids are coming with RoI. As I mentioned with the infusion idea... I doubt Bungie is going to bring anything forward. The reason I think this, is because of the fact that old-gen is 10% of the playerbase. That would leave 85-90% of the playerbase pissed because Bungie didn't move the raids up to yr2 levels. The same thing with weapons being moved up to yr2 level for old-gen. That would be a really bad choice on Bungie's part.