No she isn't a brilliant journalist, Paul Foot was a brilliant journalist, John Pilger is a brilliant journalist, they worked to expose unfairness, inequality and shine a light on the grubby aspects of the modern world others would prefer you not see.
Rebekah Brooks is a muckraker and sleazemonker- no actually as an editor she didn't write any of the shit in her papers, she was muckraker's pimp.