I have read on the Steam Forums that co-op Campaign was added. I have not seen this function yet, where could i possibly find this? If that is not what you meant, did you mean like co-op quest sieges? besides that i would have to agree with loving all the new features and I cant wait for more!
"Like the wind, we will carve our way with the krakios of the forests' "- General Dylan, of the Wind Walkers.