Many players having low familiarity
With low level skills next to hunters, Paladins have the lowest skill to success ratio among all classes in the game, which means that many players having low familiarity can pick up a paladin and play the class with relative ease and have moderate success in the battle fields. Retribution paladins particularly are a little addicting for its easy access. Many players are lured to believe they are good. This is why Lunia gold call out the spec, saying that it is successful in lower Arena brackets but significantly less so against tougher competition.