I don’t like either split view invoking method. The old method was too much scrolling, and the new dock method requires you to overcrowd your dock, still only showing a portion of your apps, while split screening apps not in your dock requires too many unintuitive steps, the worst of which is having to completely exit out of your current app. I say forget the dock, there should be a gesture that slides your current app almost off the screen so that only its edge is visible, revealing the home screen with all your apps. Tapping any app icon will then bring your current app back into full screen and pop the new app over it. Maybe non split screen app icons are greyed out. Two fast intuitive steps with access to all your split screen apps.