This is what every tank should be doing. The only really caveat for Paladins is I would look to have all Fending on when doing trash AE pulls. The reason being is that PLDs don't do a significant amount of AE dmg where pulling in STR gear is going to matter. Better off giving the healers more of a buffer to throw out more damage themselves. This doesn't apply to DRK or WAR where both can see a significant different (~300-500DPS) AE pulling in STR gear vs VIT gear.