There is no such thing as a cheap clarification for this. If 95% of different builders can hold their file sizes cheap, a AAA recreation developer like Infinity Ward ought to be capable of do the identical.
Compress audio and visuals extra. Nobody must see excessive res rusted espresso cans and different trinkets littering multiplayer maps when individuals are working and gunning.
And if they’re duplicating property many occasions over like they’ve supposedly executed for earlier video games that may very well be performed off of a standard arduous drive, cease that as nicely for the variations of the sport which might be performed on Collection consoles. These are required to be performed from the SSD, so duplicating property is actually only a waste of house.
Simply one other instance of how the CoD builders actually do not care about their prospects or participant base.