I see no reason NOT to rerun the event, though since I already got all the items on my main I doubt I'll be participating (unless I go mad and decide I want to get them on my alt...). If nothing else, it'll revitalize low-level FATEing so that new players (...and my alt...) won't be stuck leveling alone and avoiding boss fates that aren't soloable. It WOULD be nice if they added a few new items to give those of us who already cleared the event a reason to join in, though.