I too am shocked and saddened to hear this news. We love our cruise on the Spirit and never had a bad meal. Buffets are our least favorites but that is on dry land as well.
I concur with Billy that this is no doubt and anomaly. I hope so.
I'll keep everyone posted on ours in February.
I will say I am a bit surprised that they charged for LaTrattoria because it was just a cordoned off area of the buffet. This is why we didn't bother when we were aboard and at that time there was no surcharge for this restaurant.
I won't argue about the nickel and dime comment but it is something within the passenger's control. After all the mains are still free as well as the water / iced tea / cappuccino.
I agree with Billy that you need to book another immediately!