With our friend Dr. Alexander Tolmachev at MedAffairs.co, we wrote a PM360 article on Defining the Value of MSL Teams. An excerpt: 

"...medical value may include scientific data and insights related to the clinical environment, clinical studies, competitive landscape, new molecules, patient pathways or treatment approaches. Taken together, these insights can help identify key trends and issues across regions and may be filtered into medical and other discussions to assess and adapt scientific objectives, activity plans and future strategies."

A link to the complete article is here: https://www.pm360online.com/defining-the-value-of-msl-teams