When you enter the world of the Public Test Server you will find that Repetitive Quest NPCs will no longer have the yellow exclamation on their heads. Now they are blue, which makes easy to identify which quests you can complete over and over. This is important because now you will know which NPCs you may talk with, to increase your Reputation with a specific faction. By example, doing the Western Plaguelands cauldron quests of the Bulwark, will increase your reputation with Undercity from Honored to Revered, to Exhalted. Killing Undead and bringing Scourgestones to the soldiers of Light's Hope in Eastern Plaguelands will increase your Reputation with the Argent Dawn. This type of Reputation Quest Givers will now have blue signs on their heads for easy identification, as repetitive quests.