We should be able to map any action to any button, i think that would add a lot of customization and make for some very interesting controller schemes. Think of it like a PC, but for your xbox controller.
Sure, but a controller isn’t really as complex or made for this kind of stuff.
I personally just adapt to whatever the default controller settings are put my sensitivity to 9 and play campaign and multiplayer like that. Have done that for every Halo because they always seem to get a comfortable default layout for me.