I searched for some reviews of this "dlc" and look what I found on metacritic, 2.9 seems legit to me.
I was thinking about what happend to Battlefront 2 after they scored 4 on this site, they changed everything in their game right now.
Let's do the same. Please guys vote and let them know what we think of this half a dlc.
http://www.metacritic.com/game/playstation-4/destiny-2-curse-of-osiris