don't compare Yuki to the Host. ever.
and Yuki pretty easily. pretty crappy matchup for GL. trying to brute force her ain't gonna work, and in terms of manipuation of... anything but size really, she's got it beat hard. far more likely it ends up losing its ability to hold spiral energy and so do the people piloting it. if she could steal haruhi's powers, not much reason to believe she can't simply steal the mech's connection to spiral energy or the pilots' either. and it ain't like something that big or as much of an error to the universe to her wouldn't get immediately all data related to it hacked to high hell.
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The future must protect the clone's past.
"Maybe it's a tentacle, molesting the planet itself. - Aschen Brodel.