Feedback: Log in events and rewards
They're mostly fun and allow is to have a diverse amont of free content. But it seems the events are really disliked by the community as some people can't unlock allnrewards, join the event, do all quests, or just don't wan that forced on them.
So i'd suggest turning the event into a new achievement system where there are quets we need to do to unlock some new rewards just like what we have in Minecraft for the Marketplace clothes unlock system. It could be updated, adding more missions and new items to unlock and still making people who wants them to log and play the game, but only who wants a specific item.
This would make players in general more satisfied as everyone would be able to unlock any item they want whenever they want, so nothing would be forced upon them. And if someone don't want them, they wouldn't be bothered to get any.