It wasn't bad. It focused on American and British classics and what I call "founding documents" of our history. I was surprised. In a good way.
As a former teacher, I can tell you that the standards mean far less than how the teacher in the classroom implements (or does not implement) them.
My objection is that states adopted the Common Core standards under a bribe/coercion.
Be careful with just looking at the standards. What I’ve found with CC is that the required material puts a very negative slant on Western values. I teach American literature and there is still a focus on the classics, founding documents, Romanticism, and realism. The main ideas have always focused on are the American dream, freedom, rugged individualism, and optimism. Regardless of the document, American literature contains one or more of these themes. With CC, the themes are twisted to address the negative. The focus of the required teaching material is how groups of people are treated differently (read badly) by the United States. There is no optimistic outlook on how Americans have embraced our historic scars and created a better country. It’s frustrating.