Android - Get Android 7 do not disturb features back?

I have the same options on my Nexus 6P as I did on Nougat however, they are accessed slightly differently. If you click the 'Do not disturb' text in the notification panel you should see the options you're after. I get the 1 hour option and (when within 12 hours of an alarm) the option to turn off at next alarm.

This article on Ars Technica demonstrates a few other changes to the quick settings pane (see image below too).