Hey, these kind words mean the world to me, thank you so much.
To answer your question about dungeons vs hexcrawls: to me they are the same thing. I have run both overworld hexcrawls and “you are all in the infinite dungeon forever” games of His Majesty the Worm using the same procedures (called the Crawl Phase, in the text).
There’s IS a page about adapting the Crawl rules expressly to hexcrawl rules, substituting rations for torches as the main delineator for how far you can travel.