Played a few more hours yesterday, raided my 2nd cauldron. The first one was super great, just trying to avoid machines throughout the crawl, it meandered all over - very evocative! But this 2nd one was already found by cultists, who had set up their own dig. It was easily as long as the first though — and there were several stealth-camo'd Stalkers at the end of it, so it was tough! So I was disappointed that it only unlocked one new robot for Override.
Also had to take down another Thunderjaw on the heels of taking one down "for fun," as part of the Hunters' Lodge mission. Those things are fun, and a serious amount of work to take down. I'm far from flawless as a player, so I have to replenish my Health Potions and Medicinal Pouch after each time — that's a little anticlimactic.
I like the story, particularly the side quests. Anyone else sick of dialog trees as a conversation interface?