@Arwoo The thing about reoccuring events is that 9 out of10 times the medal associated with the event gets magically unregistered from the collection when the event returns anyway. Which is a bug that has been reported multiple times. If this is not deemed a bug then it's a horribly flawed design.
Why would I put time and effort into an event when I know that the medal will just be removed from my collection when the event inevitably returns? It not only takes away the incentive to re-do the event, but also removes any incentive to do the event at all to begin with.
In cases of time-limited stat medals, just have the medal be rewarded in inventory anyway, despite the medal already being registered. That way people with the medal registered still get the incentive to do the event for a refresh of the time-limited stats if they are so inclined but get to keep their collection number intact if they don't have the time or desire to re-do the event.
Most medals that don't register to begin with now are from non-KMS content/events and special hotweek/registration rewards.
My chat experience is garbage being in an active alliance and having any friends at all that do weekly dojo. That combined with all the gach and style box spam makes you miss a lot of actual conversation.
It also gives double notifications if you have a buddy registerered who is also in the alliance you're in.