Any chance its related to insects? When it was dropping leaves were the dropping from the lower parts of the branch first?

At this point i would not cut anything off. If the plant cannot support the blooms it will fall off naturally. Some plants may start hibernating earlier than others so maybe Aztec is ready to call it quits for the season.

I, too, would just leave it alone. Mine will drop leaves if it doesn`t get enough water, you look at it wrong, the wind blows, it`s the only plumeria I have ever had that loses leaves like this. Grows like crazy though. It`s getting moved across the alley next year cause I am tired of picking up the leaves from the porch.
Tally HO!

If I had temps like that, I would let them decide..

Good luck!!! I have to force because of space reasons and the sudden cold snap that always appears around this time of the year. If I have mild temps, I would let Mother Nature decide... IMO of course...

Take care,

Laura