That's basically a full game played without him. And there's been no dropoff in their defense (as of now it's been slightly better with him off the court). Even if the small sample size is concealing an effect, it's certainly not a large one.
He's a very good defender. But wing defenders are the least impactful defenders overall. He protects the rim a little bit and is versatile, but 1 versatile player doesn't help you as much as the value of having several, if that makes sense. A good wing defender can be somewhat avoided. And unlike say a shutdown NFL corner when you avoid them, that doesn't erase half the field, only 1/5. Locking down a wing player will only be relevant in certain matchups, unlike locking down the rim or disrupting the point of attack ballhandler.
For a wing defender to have a truly elite defensive value, they have to be disruptive (either help a ton at the rim or get in passing lanes/make steals, be part of a press, etc.)