Holy paladins have several features that make them powerful healers in PVP environments. Our diverse utility spells provide us with capabilities that our rivals can only dream of, and we have plenty of cooldowns that can counter our opponents' actions. While holy paladins are generally considered to be strong PVP healers, we aren't without our weaknesses. Our most notable flaw is our complete reliance on a single school of magic -- holy.
All of our spells and abilities are tied to one school of magic, which means that interrupts are incredibly potent at shutting down holy paladins. Even Judgement, which feels like a physical attack, is tied to the holy school. Interrupts are obviously potent against any caster, but holy paladins are especially hurt since we don't have any alternative spells to fall back onto. Mages can still cast Frost Nova if their Arcane Blast gets Kicked, and shaman can use any of their fire spells after getting a heal hit by Pummel. Holy paladins are useless when interrupted, which provides us with a unique set of challenges.