Meh. It's a nothing-burger article. If he truly believes in Kuzma and plans to keep him, he will say positive things about him. If he thinks he is terrible, but can't get rid of him, he will say positive things about him to help boost confidence. If he is about to trade him, he is going to say positive things about him to keep his trade value high.
It's what GMs do... say positive things about their players and don't tip their hand about what you are really doing or thinking.
If they are really keeping Kuzma, I hope the offseason will help him play better with the team and he simply had an issue transitioning... I guess we wait and see.