Bungie has now introduced their latest expansion to Destiny 2. Witch Queen is a 4.8GB update to the core game bringing Destiny 2 it to 70.32 GB in total, Bungie has removed some components to reduce the game requirements. With everything known the game by rights should be 108GB or so.
Bungie has also added Battle Eye in an effort to eliminate cheating the game. While servers can be monitored hacked copies of the game are harder to identify. User names have been changed but based on Steam user names.