>>9784754The WWE Title is and has always been the main title, the face of the company belt. When the WHC was acquired, it was used for the upper midcard scene, sometimes for WWE champions to get out of the spotlight for a spell, and other times to showcase guys deemed unfit for the main title but up there.
The belts were split by brand because Smackdown was always the B show.
Now they don't use the WHC anymore because they have a midcard title for each brand, thus reducing a layer of complication.