The best way for a business analyst to help the team work together more effectively is to lead them in creating a team agreement that assigns project roles and outlines how the team will collaborate, disagree, develop trust, and define success. This will help them align on common goals, expectations, and norms, and resolve any conflicts or misunderstandings. Encouraging leadership to share their vision for the project and ask the larger team to focus feedback only on the key objectives, pain points, and requirements outlined by leaders may create a top-down approach that ignores other stakeholder perspectives or needs. Limiting participation in key project discovery, requirements, and solutioning meetings to leadership and engaging the larger team to answer questions directly related to their roles when needed may create a siloed approach that reduces collaboration or buy-in. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/collaboratio