Patch too large, delete games to make room

On the PS4, had 44Gb of free space on my hdd. However, FF patch said could not download until I freed up 12Gb. Forcing me to uninstall a game of comparable size. Why? Patch was 231.9 kb in size. So why was it necessary to free up an additional 12Gb to just get the ball rolling on the patch? Is there something wrong with my system?
(Note: I did uninstall and reinstall after SE made the announcement that the game will take up less space now some time ago)

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The PlayStation 4 version of the game will update and download through the PlayStation Network onto your PS4. For further assistance regarding the download and installation of the game on PS4, please contact PlayStation support here: https://support.us.playstation.com/

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