You are right. This book will help someone who is starting out in data marketing. Author is right that in most organizations, results are not measured because people don't want to be accountable. We must measure results and metrics are important. This book educates us on the correct metrics.
We also know that segmenting the data by quadrants help us zoom down to the issues. We know to compare performance by time, before and after.
I have been a intermediate data analyst and this book doesn't help me much. I would have preferred a hands on with sample data sets. But I guess no author will share real life examples, it is upon us to learn at the job, by mistakes or from our seniors.
Using the excel template is easy, But the problem is making the assumptions about the revenue and rates. This is the key.