With previous years' pattern of moonfire fair event rewards, I was actually expecting yukatas this year instead of swimsuits. From what I'm aware, it's been swimsuits -> yukatas -> swimsuits -> yukatas since 1.0. Last year's swimsuits (which are the ones added to the cash shop recently) were unique to the bikinis we've gotten in the past, and there's only so much that can be done with yukatas so it's nice to have a break from that pattern. Especially since the event reward is something that has been asked for by the player community.