I was hoping for Parker, but I do think that Staley is a good pick given his experience as a DC, play caller, and HC. Parker was exciting, but we don't even know if he can call plays. I'm not sure Staley is a guy that can create a great defense without talent, but I'm not sure any DC really can. Even Fangio went years with mediocre defenses when he didn't have talent.
Anway, I'm excited that we are getting the Fangio system and I hope they find a great DB coach to help Staley implement coverages better that he did with the Chargers.