Not having Selectable Missions, the most BASIC feature in Video Games. Destiny 2 at launch was semi open world too and Bungie still allowed for missions to be replayed so there is no excuse for you to not have selectable campaign missions so we can go back and get the skulls we missed without starting over completely.
It’s probably coming with co-op. Seems like a necessary function for co-op to work, so roughly six months.