The strategy designer should propose facilitating a co-creation workshop to help generate ideas grounded in research insights, to improve the situation of customer churn due to a disconnect between product features and user needs. A co-creation workshop is a method that involves collaborating with stakeholders and users to ideate and prototype solutions based on research findings and user feedback. It helps create solutions that are aligned with user needs and expectations, and increase user engagement and satisfaction. References:
https://trailhead.salesforce.com/en/content/learn/modules/salesforce-strategy-designer-certification-prep/facilitate