I also HATED the direction of Cold Dead Hands.
HOWEVER I think the point he is making is when does BL get to stand on his OWN? Get built UP on his own.
To be his own franchise. Like we see with the guy from Wakanda and Danielle Cage's Daddy in Harlem or nerdy kid who sounds like Phil Lamarr in Dakota.
Because right now you are using Batman's book and name to showcase a character that is not linked to Batman.
Because lets say that book sales-the EXCUSE will always be it's due to BATMAN and no one else. So why give them any shots. Never mind 3 had solos. 2 ruined by editors.
I think he wants to see an EFFORT to build up BL without help. Miles nor Ms Marvel are where they are being sidekicks to Carol & Peter. They had their own books. Same with Panther 20 years ago.
Batman can not keep being used to build others.