As much as Kravitz is listening to Aziraphale, he's very invested in whatever Crowley is doing now that his brain has started saying it's Most Definitely Bullshit. The slit eyes and direct look do little to bother him, but he also has no direct evidence to call Crowley on, so he needs to continue to look like a reasonable person. It's the worst waltz in the world, and he intends to stop doing it as quickly as possible.

"Well, if that is the first objective, I have no oppositions. I trust your judgement on what you think might help." Kravitz is still watching Crowley hard enough that he feels like he's going to burn a hole straight through the book in his hand, but at least listening enough to keep up conversation. "If I were you, I would try in your tests to segment things down to simple items and go outwards. For instance, changing something's shape might be easier than making something another thing, or creating something wholesale. Perhaps something to investigate."