That's because it's a PBR material (which has a special material layer for skin microdetails). 8.0 uses, as default, Iray materials, so it's not compatible.
Wish there was a way to add the micro details section to Gen 8 models. I've been trying my best to copy a skin over to a gen 8 model, but it's losing something and the skin just doesn't' look the same when rendered, but I really would love those new skin details.