This patch will overwrite all patches for this game in the system... that's the biggest issue right now because the next patch 1.05 will have 2.3GB plus what new/changed was added in the patch.
They needs to fix this system to the player just receive the changed part like:
No patch = Receive the full patch with 2.3GB
Patch 1.02 = Receive just the changes after the patches 1.03 and 1.04
Patch 1.03 = Receive just the changed in the patch 1.04
So the size will be always smaller unless you need the full patch again.