Is Kouzzina being completely renovated, or just the area in the front where the seats are? My guess is that if the kitchen itself isn't being renovated, they'll be keeping the restaurant open for the cooks at least, since Flying Fish will still needs its own kitchen starting early in the morning to prep - fine dining kitchens open to cooks by 9 or 10 am depending on your level. In summary, they might still be using the same menu because they might still have the same kitchen/ingredients/prep available to them, which really does knock down the possibility of errors and is a smart move on their part if they can keep it running.