Yes, good article. Fortunately, keep a bare bones Contact list in my iPhone; less than 20 people. Also, most are listed by first name only, and if there are more than one with same first name, I list their first name as Larry T. Very few are listed by first and last name. Hope this works to my advantage with Alexa.
There was a third update of new app again on Sunday, indicating the the new app really wasn't ready for prime time. So, I am willing to go along with the new app for now, but if I ever want to bail from the calling feature Amazon will get a phone call from me to remove me from the service.