User blog comment:Raybat/How come Death is dead but the witch lives?/@comment-79.181.5.199-20160430122020/@comment-79.181.5.199-20160430192519

As I said, Rowena is actually usefull. As a powerful witch, she was able to find out how to open the cage (And by the way, how does only Lucifer appear if Michael is in the cage as well?). She is also the mother of Crowley, which developed his background story. Rowena was also the one who actually healed God's older sister.

So yes, Rowena is still useful unlike the former Death who was around since season 5.