It is always refreshing to hear the valued opinion of a true expert!
Those of us who have competed have some idea about contest preparation. When a guy like Kai gets it quite wrong everyone notices and comments.
If we forget about the scale then I can't understand how Kai allowed himself to be that smooth coming into the contest. It appears that he is a week or two or three or four away from contest condition.
The only explanation I can see is that he knew he had to defeat Jay so thought he had to match him on size. He did that but paid the price. In the meantime, Jay had reduced somewhat because he knew that size alone can no longer win the Olympia. We can blame Ronnie Coleman for the inferiority complexes most of the big guys must have.