The black screen you describe I've encountered once before, and it seems to be an unpredictable effect of the "fade to black" function, where it covers up the dialogue box and you can't see the next bits. Possibly a way to deal with that would be to launch a new dialogue after firing the fade to black. Not sure. It's unpredictable, so I can't be entirely sure I succeeded if it functions properly when I do it.
I'm guessing the disarming is happening with the kuo-toas?
From your description of the difficulty of the fights and the number of times you had to retry, it sounds like the encounters are the kind of challenge I had in mind. Indeed, with a bit of buffing, they would go a lot more easily. I provided a good number of spell scrolls in the shops that the wizard can learn to add to her selection.
You definitely did miss some of the quests, and you didn't mention certain ones, so I don't know if you found them or not. Some quests begin in shops, so check the map pins and be sure to visit shops you may have passed by. There's also a
I agree that more custom monsters than the ones under the sea would be nice -- some of the choices were limited by the environment and what monsters were available that were appropriate for the environment I chose, and most of them wouldn't get along together according to the docs (hence the separated sub-regions), which necessarily prevents mixed enemy species in encounters if they're xenophobic, unless they have pets or enslaved minions. Then again, there are some modules/games where the enemies are entirely humans!
I appreciate the glowing review on the Vault, EE, and yours, too, PJ! Glad you had fun, and thanks again for the reports.