I will use yogg as an example.
A ret paladin can BoP a constricted player and instantly free the player and kill the constrictor instantly.
That’s a 100k hp mob (25 man) instabtly dead and the constricted player freed.
I would say thats one very useful utility ability. Yes it isnt exclusive to ret (other paladins have it), but the fight can see multiple constrictors.
Thats one example.