Also In the way of Orbitals, having looked back at the covvie Superdestroyer/battleship whatever you want to call it, may not be a ship, but a mobile gunnery platform, Kinda like an orbital starbase or something.
No repulsor engines that i can see, bit wide ect.
If the covenant are going to have some form of station or at least a logistical staging post perhaps a rework of this would do.