For being the premier tank class Paladin's HP is pretty low and also the skills Paladin's get to tank with are pretty poor. Instant cast Holy Succor would be a big step in boosting enmity and survivability but the biggest problem is damage reduction, maybe take Guard back to it's old active ability status and let it reduce a percentage of damage taken while active. Anyway, Warrior abilities are just plain better than Paladin ones so something should change