This is certainly for reasons of time and methods and won't suggest a visual retcon. Canonically, the physical appearances and harnesses worn because of the Elites as well as other species of equally the Covenant and the Swords of Sanghelios through the activities of Halo 5: Guardians would've been https://augustckpuy.bloggazzo.com/28004819/halocuan-98-no-further-a-mystery