It feels obvious to me that Sarah's response was the right one. True that she didn't stay after dropping off Max to discuss the matter, but he'd already proved at Hank's shop and presumably throughout the drive that he wasn't interested in understanding her point of view, and when Kristina called after him to get him to stay and explain, he (as usual) ignored her and stomped away. So I'm also curious to see how this plays out, and whether the show stays on Adam and Kristina's side or not.
Dave Rose would have really enjoyed being a PhD candidate in Education, I think.