It's useful for me. During the last event, some characters had quests for event currency and joint quests with non-Event currency characters. As an example, I could leave Daisy Duck at home so I could farm the event currency with Mickey. Party way through the event, I would level up a random character, and I needed to check home to see which characters could now collect tokens again. I would first have to empty all the characters back into the park, then rehome those I didn't want to use. Being able to see what they collect is useful for the forgetful.