Oh, jeez. You ascertained this all from a "smile". The vast majority of FA's probably don't even know what a 'K' fare is (let alone would they be provided knowledge about future changes in the domestic upgrade program). Sorry, but I'll take your speculation with a large grain of salt.
Completely agree. The average FA has no clue what is going on in this area. They would be one of the last to know. And, I guess why would they need to know. It has nothing to do with their area of the company.