it's cool to see them performing. I like the perseverance and drive of them as a 2 piece, seeing them give it their all while down a man. And it's cool to see them doing the rotating instruments thing, but really I hope they kind of get back to their own instruments and just get a session/tour drummer if they don't want to replace Kumiko outright. I think it's best for their sound to focus on the instruments they're most skilled at rather than trying to fill/honor this void that Kumiko left.
Having said that, HATENA is a boss fucking song lol