Saviior, but Halo 5 did get updated textures when it got its 4k patch to run on the one X. And even though dynamic scaling happened, that doesnt mean the game was not native 4k. It focused on frame rate first but running it on series x means that both will be rock solid. 60fps and native 4k throughout.
the only thing that halo 5 is missing out on (that mcc is getting) is a 120fps mode for multiplayer.