Why aren’t the new Ravenloft version of Mongrelmen a player race?

@tbok1992Why aren’t the new Ravenloft version of Mongrelmen a player race? They’d be great as an aberrant pc-race option! thought about it, didn't quite fit into what we wanted to do with Curse of Strahd

— (((Mike Mearls))) (@mikemearls) July 7, 2016