There shouldn't be any damage to the hibiscus. Many times people root trim them to maintin a certain size, so they should be fine.
As for growing new hibiscus, (wouldn't that be wonderful!), but if you're talking about tropicals, which I assume you are, the roots would be killed by winter cold anyway.
Barb

Long overdue for bigger pots. Plants rooted into ground, torn/cut free CAN be adversely affected, as the roots still in the pot may be mostly old and woody if ground contact has been made long enough. If there is any wilting, that is probably what happened. Repot and keep moist, wait for recovery.