Patches are not only for internet play Lav, they also fix small game bugs that they hadnt noticed before releasing the game. There are lots of examples
SPOILER
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- for example there is a thread over there of a guy that had a problem coz Sarevok wouldnt talk to him in the ceremony, and he solved it by installing the latest patch.
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"Sigh" -Ertai, Captive of the Blinding Angel