What would happen if the moon rotates even faster than its usual rotation, ?

Well, since the moon controls how the tides roll in, I'd say that if the Moon started spinning faster, they would be more dramatic. They'd rise and fall more, and they probably and inevitably re-shape the shore lines. It would also speed its orbit up around the Earth, making it easier to see the Moon during the day, at around high noon.

Inevitably- certain to happen

I hope this helps you!

:)