I love my iPhone X. But if I got to change one thing, I'd change the way it gives you access to Control Center. That upper right corner swipe is quite difficult to do one handed, and completely impossible when you're a leftie.
I'd love to 3D Touch the home indicator to go to Control Center. Or have it available via multitasking. Or as a view on the right of the home screen similar to notifications on the left.
But for now, I've used Accessibility >> AssistiveTouch to embed a Control Center button on the bottom right of the Home Screen. It's not pretty. But it works.