"The conservatives' problem with Miers isn't how she thinks, because they have no idea. It's that she's not like them. Miers is not an energizer-conservative, beating the drums under the windows of the liberal enemy."
Between this and the former NYT article (also see the WaPo article), one really gets the sense that Miers is independent, strong, but not loud. She doesn't seem to be afraid to say "I don't know" or change her position on the best solution to a problem (note the Texas redistricting) and, though a mystery, is certainly not an ideologue. At the moment, criticism can focus on concern over her relationship with the president, but certainly not her.