The way I interperet the DCV is that this games code was not built to hold more than two years worth of content, as during it's development activisions contract demanded another Destiny game in the next two years. Bungie would obviously scrap and move on from this contract to continue supporting D2, but since the foundation of the code/engine didn't have this in mind, D2 can't handle the weight of what it has in it, so Bungie's solution to the plan is the DCV. We'll see how it pays off for the games health, but the bugs of D2's SotW is something I see as the game crumbling under itself.