i could be wrong or just misunderstanding the big picture but games like fortnite and fps titles that were built for or have a PC version sometimes have more detailed control options , some bindable to keys; whichvwould be where the extra button slots on the interface would come in handy ?

Maybe this is a possible add? When you create a profile it asks what type of controller you are using for this specific game profile (Xbox360, Xbox One, PS3 or PS4) in theory could another controller option be created for the Elite controller so we could map it out just like the normal controller ? But with the added buttons on the underside having its own drop down bind option menu. I think that made sense lol

Is there a way to set hotkeys for weapon slots in fortnite on xbox one? without just plugging in a mouse and keyboard into the xbox

just do what I do and land somewhere secluded enough you don't run in to many people and farm for the first circle and a half and you should be ok

It would be really nice if we could bind the weapon slots then I would say a majority of flow issues , at least for myself would be taken care of . that and a "Last weapon equipped" option would be amaze face. so instead of having to quickstep from axe to a weapon you got just equip your sniper and then say your AR and quick swap between the two regardless of placement on the weapon slots