I think he's perfectly serviceable on defense, and opponents respect him when he shoots. He stretches the floor, and he's at 39% on 3's. As audiosway said, the current ball movement seems to suit him.
I think Kyrie also needs Klay for an assist in leadership now. Klay's minutes are down slightly, but they need Klay in the playoffs, and I assume Kidd is making sure he's healthy.
Maybe you re-think that in the summer, depending on this very strange second half of the season, but trading Klay shouldn't be a plan now even if you could trade him.
I think Kyrie also needs Klay for an assist in leadership now. Klay's minutes are down slightly, but they need Klay in the playoffs, and I assume Kidd is making sure he's healthy.
Maybe you re-think that in the summer, depending on this very strange second half of the season, but trading Klay shouldn't be a plan now even if you could trade him.