The only thing that worries me about this part of the event being ongoing for four weeks is what it means for turn-in ratios. Because we've had four weeks to, really, do nothing more than collect items, are they going to set the bar "as low" as five or ten items?
I was there for the first two nights, got one of each item as they became available, picked up a few others, and since then I've only gone into the Dark Moonglow to check if anything's different. All in all, I think I have ten swords/shields combined, two cloaks, and six threads.
If the turn-in goes live, and the players are told, "Well, you had a month to collect things, so it's going to take ten cloaks/ten threads/"and so on, I'm going to be a bit miffed.
I'd sleep easier not necessarily having the full scoop, but just something like "the players who haven't collected more than a handful of items will still be able to get some sort of reward."
(And yes, I do expect a reward in this instance, since unlike any of the other invasions there's no actual impetus for us to be killing anything in Moonglow aside from maybe the ethereal shadowlords. I mean, the NPCs are telling us that Dark Moonglow doesn't even exist and isn't a threat! So, it's hard to picture any motivation that isn't "kill, be rewarded" right now.)