they should have had seal of wrynn use the icon of the original ring from vanilla imo.it's a small detail, but I think it would've been nice to have that added tiny bit of consistency.
For unholy that ring is probably insane but due to mastery it's dead for blood.
The priest ring grants the Hope buff on you and not on the target that triggered it. It also increases dmg AND healing so it doesn't matter if you proc it from attacking a low health enemy or from healing a low health ally. In both cases, you get a stack that counts for all your future healing and dmg abilities. (See how the DK ring specifically states you inflict it upon your enemies while the priest ring states YOU get Hope)
Seems coolio