There are file sizes you simply can't get around, i.e., gun and armor models. They can be rather beefy. This also assumes that given bungie said yes to unvault all content, it could take well over a year to roll it out with the massive reworks to terrain that needed take place during the engine shift in beyond light. This isn't a matter of upscaling. Every area reintroduced is rebuilt from the ground up, which sounds odd, but it is more unfortunate to get the content back. Optional content downloads could work but that would also mean bungie needs to support multiple versions of the same game and can't allow for large amounts of overlap between dlc and base content which there is. Don't get me wrong, I want the content back, it just doesn't seem realistic when I prefer to get new content.