I think ever since they acquired F&S they really have been trying more. Not sure if that has anything to do with it or not, just seems it.
I feel like chain pet stores are hit or miss. It tends to come down to who they hire to mind the fish area. If those hirees are knowledgeable and care, the tanks and animals look and do much better. My experience around me though is based mostly on their freshwater stock over the years. I never had issues with disease or die offs. Most do not have much or any saltwater.