We have taken a look at the Android N notification system previously, courtesy of Android Police. Now, they have released images of what is a work in progress Settings app that we might see in the coming Android N.
One of the changes is that they have removed the lines between items that belong to the same category, and only put them between different categories. Also, items on the main list will now show additional info below them, such as the Battery item showing the battery status. Lastly, if you are in Do Not Disturb mode, the app shows a drop down at the top for some reason..
If you click on any of the items on the main screen and go a level deeper, you will see the new hamburger menu appear on the top. This will let you jump to any of the other sections in the app without going back first.
Again, these are essentially mockups of a work in progress build of Android N, so a lot can change in the final version.
Check the source for more info.