The Kings really have no reason whatsoever to deal Cousins. I think this is just the other teams fishing and hoping Cousins gets the message and demands a trade, because that's the only way the Kings feel any pressure at all to unload him. He's young, talented, and locked up on a multiyear deal - what's the point in dealing him and starting over yet again?
In two years when he only has one year remaining on his deal and the team is still horrible, that will be the time when he becomes available.