I thought it worked the first week because it made you believe Sunshine had no chance and it inflated Shabby's ego, not so much the second week because it was just non-smoker domination. I don't see a need to make anyone happy unless it's going to increase drama, and Scabs/Caohejfee being saved tonight would have just made the eviction more predictable.
If Scabs/Caowehere were evicted, it would have been good to save one first.