Think DA always thought he could pull a rabbit out of his hat and figure out how to talk Davis into coming and the Kyrie thing would work itself out .   I guess Davis learned that Irving was bolting for sure and made it clear he would never stay .  
The house just fell in on Danny s plan.   
Durant forever being unhappy ,  unhappiness at GS is IMO started the avalanche of movement .  Hayward sucked , Davis was balking at being a celtic , the kids were whining ,  it was more than Kyrie could take .
He maybe more happy in NY  , but i believe in the long run he ll be worse off .  Durrant is a skinny mess ready to,fly apart.