They should just revert tbh. PS4 "copying" files stage of updates for any games have always been trash.

It should not take me 20-30 minutes of waiting after downloading a 1 min minor update to be able to play.

Under the old system I fully downloaded and was able to play major patches and expacs quicker than im able to play minor patches since the changes.

TLDR: Revert to the old patch sytem on PS4 the new one is an absolute joke.