fluffybunbunkittens
Hero
I actually really like the concept of Watchers, but it suffers from a bit of power creep as later content is prone to, and Paladins certainly don't need power creep!
PHB already gave us Vengeance's Hunter's Mark / Misty Step / Vow of Enmity and Ancients magic-resistance aura. Watchers isn't really breaking any new territory, it's just Paladin being Paladin.