I have no skills for drawing, so using some of these tools (Watabou, Inkarnate, Dungeon Scrawl) were essential for me, and have become tremendous assets for me as a DM. I didn't want the inclusion of work done in these tools to detract from the authenticity, so I'm very happy to hear that was the case with you.
Thanks for taking the time to read through the adventure, it's appreciated.