Thank god it's frozen now. I dunno what Bitfinex team can now as the damage has been done. If they can rollback then that's the best option.
What they do next is what will define them in this market. Let's wait and see.
The only damage would be how many bitcoins/litecoins were withdrawn during the attack. When Gox was attacked, approx. 2,000 bitcoins were withdrawn. Gox covered the losses out of their own pocket. (It was small change to Gox at the time).
I highly doubt Bitfinex keeps more than a few hundred bitcoins at a time in a hotwallet. Also, large withdrawals have to be processed manually.