The irony for the officiant is that the only way to promote harmony among the various voices at prayer is to focus on their own. The role of the officiant is to pray through the chaos so the chaos can eventually find order through the prayers. The officiant must be attentive to all who are praying, but not at the expense of their own prayers.
Christianity without a Creed risks becoming an endorsement of works righteousness, of human effort at being a decent person. With the Creed, Christianity becomes a remembering of what has been accomplished through Christ.
Cranmer’s Kalendar demonstrates the basic principle that Anglicans are meant to engage Scripture, as far as possible, in its entirety.