I think the process described for the failure of the person chosen by the electors to qualify is a little better than opinion.
Our system has worked for more than 50+ presidential elections. It works because the vast majority of people try to do the right thing.
I believe that a person who is a citizen at birth is a natural born citizen. I recognize that some folks prefer a more complicated formulation. I recognize that usually they do so because they oppose a particular candidate for other reasons. I understand that and I can live with it. There are not enough of those people to make a difference.
There is really nothing to get excited about. Our system works well.