And I prefer it this way I hope they add more buttons though. Swipe actions are limited to two, but you could easily fit six buttons making the covers finally actually, well, useful. Like widgets used to be.

I envisage something even simple, such as swipe and hold. Swipe from the top to close the app, swipe and hold to lock the device. I don't know about others, but for me locking the device is by far the most common operation. It should be triggered by a very simple gesture.