Why is the event being reduced? First from 2 weeks to 1 week and now from 50% everything to 25%? It's summer time. Players who only want to do their missions for a short time would be happier with a 50% cooldown for missions. Many need to save their silver. Usually with a 40-50% loss. I think it's kind of unfair, especially for the non-Ruby players.
I communicated the idea to Kizuna a long time ago, then the event came about in exactly the same way and now ...
PS: The event is already running...