The top-6 was also playing very well that game, so it's not a surprise that Quinn played them more in a game that they were dominating. This has been his MO for two years now, and I'm not sure people get continuously surprised when he does it.
I take it as a positive note that Quinn realizes Kakko is playing well and that he should get the bump in TOI he deserves in the near future. He already switched PP2 to have both Laf and Kakko on and said that they'll get deployed more. Now, the underlying issue is that Trouba will be manning this unit when it should be one of Fox or Tony, but I've already posted a bunch on that and am not diving into it more.