I know it's not ideal but you can go to
Settings --> Sound --> Volumes and then change them there.
But the issue is that ringtone and notification are locked together, not separate. You can't turn down the notification level still have the ringer on high. Can't understand why they would do this. Fix in a future update maybe?
Anyway, my pet peeve is the inconsistent battery life. Great some days, not so great others. And my usage is pretty much the same from day to day.