>>81485473cover seems to think her singing >>>>>> all other abilities and that's just not a thing really. we don't just bow down and go "but she can sing, tho" and excuse the fact she is actively going against the grain for everything else. can't game, doesn't really give a shit about holo girls but looooves the guys, can't do anything really besides karaoke which is already on rerun highlight reels like a month in.
they were hoping to get another Mori I think, hence irys/the vsinger thing also got going. however erb isn't a musician as far as I know in terms of actually writing songs/melody, playing instruments etc. cover would just make her sing to some jpop slop or cringey wannabe-anime-OP stuff that has literally 0 natural interest/growth potential from any westerners who weren't already her fans, same problem irys has.
mori isn't a musician either and her music is also cringe but she does write her own shit at least (even if it's transparent as glass insecure about owning da haterzzz) and does try to at least appeal to genres westerners actually-fucking-listen to.