Do doctrinal distinctions disadvantage the nature of Christian unity? No. Immaturity which seeks to soft-peddle the value of a confessional identity does.
“The cause of unity in the church is best served, not by finding the lowest common denominator of doctrine, around which all can gather, but by elevating the value of truth, stating the doctrinal parameters of church or school or mission or ministry, seeking the unity that comes from the truth, and then demonstrating to the world how Christians can love each other across boundaries rather than by removing boundaries. In this way, the importance of truth is served by the existence of doctrinal borders, and unity is served by the way we love others across those borders.” Bethlehem Baptist Elder Affirmation of Faith, 15.3