i need help - no metaphor and next paragraphs

this isn't prettied-up at all. but it's basically what i want to say. i'm also including a rough draft of a few of the next paragraphs...

The first step to treatment is diagnosis. Once a clinician is sure of someone’s diagnosis they develop a treatment plan. Unfortunately, the treatment of many psychiatric illnesses is not necessarily successful. While there is a great deal of research on improving treatment, perhaps it would be worthwhile to also take a second look at how we classify patients.

OR

In any medical field, the first step to treating a patient is the assignment of a diagnosis. Once the patient’s symptoms have been catalogued and assigned to the appropriate diagnostic category, physicians can then work from within that diagnostic paradigm to arrive at a treatment plan. Despite this systematic approach to medicine, many mental health patients are unresponsive to treatment. As a scientific community we are diligently searching for more effective methods to reach these patients, but it is critical that we reconsider our diagnostic criteria: it is time that we permit etiology a say and acknowledge that a system of psychiatric nosology is incomplete without an exploration of causes.

OR

The first step to treatment is diagnosis. Once a clinician is sure of someone’s diagnosis they develop a treatment plan. Unfortunately, the treatment of many psychiatric illnesses is not necessarily successful. While there is a great deal of research on improving treatment, perhaps it would be worthwhile to also take a second look at how we classify patients.

AND THEN THE NEXT PARAGRAPH:

To understand this _____, one must turn back the clock to 1980, the year that Mount St. Helens spewed volcanic ash across the Pacific Northwest and the year that the APA rocked the nation with a third edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III). By publishing this new diagnostic tome, the APA provided a universal—even international—language for psychiatrists; it instituted a focus on objective, precisely structured diagnoses; and it inaugurated the much lauded multiaxial diagnostic system. However, the makers of DSM-III and each subsequent volume employed a classification system that was atheoretical to causes. Indeed, the revised versions of the DSM concentrate so heavily on symptoms that they risk ignoring etiology. SPEAK ABOUT FORMER ETIOLOGICAL PERSPECTIVE. Thus, while useful in many ways, this shift in diagnostic practices may have misdirected the field of psychiatric genetics.

The completion of the Human Genome Project has ushered in a new era in psychiatric genetics. Specifically, successes in the identification of risk genes in schizophrenia (e.g., dysbidin, neureglin reviewed by xxx), these successes may be the turning point for genetic studies in depression, anxiety, substance use, bipolar disorder, schizohprenia, autism and attention deficit hyperactivity disorder....