Ah-hah! Thanks for the explanation. Well, I'd agree that conservatives would be cutting off their nose if the likely replacement for Miers would be someone worse. But I think that's extremely unlikely. If W withdraws Miers, it will be because he realizes he cannot afford to alienate his conservative base. So in all likelihood he would replace her with a proven originalist.
The replacement for Miers, should there be one, is very likely to be Gonzales.