It’s because they don’t just add most of the time they mostly take away something and fill that hole with something new, that is only something that should be done when it’s necessary, look at Warframe, completely f2p game with updates that add or change things for the better when something feels not great for there players, apex they are starting to add stuff with the new freedom they have, Fortnite just can’t really add, they try to add more movement but it’s literally the most unstable thing, they tried adding bloom and removing hitscan which was the bane of Fortnite players, now they tried to remove the battle bus for player isolation but did it horribly, you are not supposed to break the design of the wheel you are supposed to innovate it to make it better