Fortunately, I have not experienced a lot of negative aspects to the game. There have been a few. As for the event my concern will be the goals involved. About 50% of the guild has not logged in with any consistence, while many others attempt daily but cannot get in. I am certain most guilds fall into this category. The event goals will definitely need to be adjusted down. Also the onus should be on completing adventures not just co-ops since it is going to be tough to find people much less have them stay on without getting frozen or booted. And that will prolong the co-op and heighten the frustration.
My recommendation would be to include any adventure that has a Loot Spot (LS) with this event. This way you can still get the loot adjustment and not be overly concerned if you cannot find another player