I feel like tying HotR to Seal of Righteousness is Blizzard's way of trying to prevent seal from going the route of auras, by forcing us to use them. I would almost prefer it if they just gave us separate Judgements that would apply a 20 second or so buff that would just give you whatever the seal would have (Judge of Truth -> get to stack Censure and 12% damage on hit, etc.) So when you wanted to AoE you could judge Righteousness and go to AoEing, without the spent GCDs of seal swapping. In a way, this is almost closer to how seals worked in Vanilla/BC.