Haven't seen this mentioned but I just noticed that while the phone screen is off, if I swipe down and hold my finger on the screen, the screen will turn on and display the time (top quarter of the screen).
On my g4,it works with the qc case setting set to offIt appears to be tied to the Quick Circle Case toggle in settings. When it turned that toggle off, this stopped working.
What I like about it is that you can do a lot less "waking the screen" in order to check the time. Double tapping is great, and I use it all the time, but a) it turns the whole screen on which in bright light is a battery waster, and b) you then have to re-sleep the screen when you're done.