With the release of iOS 12, Apple hid the button that allows you to jump from the front camera to the rear camera (or vice versa) during a FaceTime call. Once a one-click thing, it was suddenly moved into a menu as if it was not something you might use half a dozen times per call.
You do not like the change? Good news! Apple reverses it.
Starting with iOS 12.1.1, released today, the camera replacement button returns to the main call screen. Basically, every FaceTime call I've had since this change started with the question, "Wait, how can I flip the screen? What the hell, where did the button go? "Resetting is the only right call.
This build also introduces the ability to take live photo captures during a FaceTime call if Both callers have turned the feature on. You do not want someone to grab live photos in live chat? You can disable it with a switch in the FaceTime settings.
Aside from these two changes, this update greatly improves existing functionality. According to the patch notes: Real-time text now works on Wi-Fi calling, dual-SIM support has been added for additional network operators. You can now hide the sidebar in the News app on the iPad and have all the usual bugs. Power corrections.