Am I right in thinking that, aside from going online and helping another player defeat a boss, all the things that shift World Tendency towards White are one-off events? The various NPCs, Major Demons, Phantoms etc don't respawn until NG+?
Online doesn't really seem to work for me. It was fine the first time, but now, even when I connect there are no bloodstains or messages anywhere. And the supposed all-pure-black Halloween event doesn't appear to be taking effect.
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"I'm Commander Shepard, and you're standing in the biggest library in Citadel Space. Look me up."