PMP Practice: Promote the Shared Vision

Rafael Espinoza-Leal leads an agile team at Organized Stampede Labs developing a mental health chatbot app. Three sprints in, the product owner wants AI-driven mood tracking as the top priority, the UX designer insists accessible design for vision-impaired users must come first, and the marketing lead demands social sharing features to drive growth. During sprint planning, team members express confusion about which direction to pursue, and velocity has dropped 30% as developers wait for clarity. The team's original vision statement focused on 'affordable mental health support' but doesn't address these competing priorities. What should Rafael do?