What was the purpose of removing the incredibly useful feature of being able to hide the navigation bar entirely? I found so much use in it and it seems like it was removed without good reason, when the new option could have been added as just that: an option. So far not a fan of the new update at all.
You still can, it's just a bit different. Not sure I like it more, but it's a fix. Under Display in Settings, choose Navigation bar, then choose full screen gestures, then turn of gesture hints .