I was very frustrated and was about to get rid of my ring system as the new app is very cluttered. I was no longer able to answer my door in a timely manner do to the clutter. However I found a work around for this and it will allow you to answer the door the old way by doubletapping the notification, swipe down to accept call like you use to be able to do.
Here's how I changed it:
1. double tap on the hamburger
2. swipe until you hear new features and double tap on that.
3. Swipe until you hear "Now you can see all of your camera events in one place, swipe after that and it will have a switch button for history timeline, double tap to turn it off.
This should remove the clutter to answer your door and answer the old way.