I hope that at some point between this time, Yomi really try to get improve on his voice's health and leave his solo project for the good, otherwise, I think their hiatus would be kind non sense.
I've been thinking lately if Nightmare could work with other vo. (or if there is any other vo. in the scene that could replace him... like him or not he's kinda unique). I imagine Asagi could somewhat work...? but I am totally not convinced.
I couldn't imagine the band playing without him or without any other members, there are bands that really "lost it's true soul" when any part depart/got replace. Yeah, It's so bad that he didn't got enough work to keep it clean :<