The season centers Bailey, a Black woman, as the new Chief of Surgery, with arcs explicitly exploring her struggles as a woman in charge and tensions with her husband over power dynamics, highlighting feminist workplace politics and female leadership. Prominent LGBTQ+ representation drives major plotlines, including the extended custody battle between lesbian exes Callie and Arizona over their daughter Sofia, which culminates in the finale and addresses same-sex parenting challenges; Callie also advocates for teenage girls in a same-sex relationship and begins a new romance with Penny.

Additional elements include Maggie's interracial age-gap relationship with younger white intern DeLuca, Stephanie's storyline revealing childhood trauma from unethical sickle-cell experiments (nodding to racial medical disparities), and episodes tackling gun violence and women's autonomy. The diverse ensemble cast—featuring multiple Black leads like Bailey, Maggie, and Richard Webber—is standard for the Shondaland era, with color-blind casting normalized but prominently featuring non-white and LGBTQ+ characters in lead roles. These elements significantly shape character arcs and plots without fully overwhelming the medical drama format, as evidenced by strong ratings and positive reception at the time, though they reflect intentional progressive integration rather than neutral entertainment.