I'd rather start thinking about members mental health for now...
and it's CUBE so well I'm even more concerned
honestly we know that Soyeon and Miyeon were both handling group in terms of K/DA, as well as solo/production (Soyeon) and tv/radio promotions (Miyeon), and they have two foreign members which are loved - Minnie & Yuqi, both for sure thanks to promotions in China and Thailand will boost group sales.
So after end of the day they might sell the same but for sure won't be the same as a group.