Totally forgot this post.
Ok ill lighten my point again, priest with staff, should be on aggressive play style, which means you are much more easy to make/assist kills than with a shield.
I am not against the idea to give LG staff white AC, but the idea behind is not ideal, because i believe we dont want to see priest with staff still hard to make kill, or hard to get killed. It should be opposite. People are bored of fighting priest with turtle CA set, I think its more fun to play aggressive with a staff against melees compare to CA them down.