I'm not sure I can say I gave Draw Steel a full fair test, but I did confirm that it was NOT going to work with the library kids.
Part is on me: I have never run tactical combat the way that DS is designed for, and I found the unfamiliar cognitive load burdensome.
Part of it is on the Delian Tomb, the starter adventure, which opens with 4 big combats with minimal interstitial tissue that, with my cognitive load issues, wore me down.