I hope they fix the UX horror show that is iOS 12 on an iPad Pro with a home button:
Drag up from the bottom of the screen: open the dock
Drag up from the bottom of the screen: go to the task switcher
Drag up from the bottom of the screen: leave the current app
It usually takes me two or three attempts to get the right speed and distance of drag to achieve the result I intended.
It would also be nice if they could come up with an intuitive way to use Split View and Slide Over, as no matter how often I use them, it's still a case of trial and error until I get it set up right.