I almost finished running this episode, that is also the first of the Hand of Henrin series.
There is a good investigation part in the small village of Black Oak, in the foothills of the Peaks of Booh, then a dungeon crawl to get the unholy priestess and release the captives... so, at first sight, nothing so excitingly innovative. Reading the adventure before running I didn't get the impression it was a particularly egregious adventure either. I noticed the difference only while running it.
The characters messed up a bit everything, taking very unexpected ways and options, so I was prepared to improvise a lot outside the script. However, after all, the information provided was so nicely crafter and comprehensive that, although messing up the order of the events, I practically found everything ready to be run. In practice, reading carefully the adventure, I was always able to find something that made sense and that was the most appropriate information for dealing with all the "out of the box" options that the players decided to take.
This doesn't happen very often and is the sign of an adventure well-thought, well crafted and well written down - perhaps if everything went as planned I'd miss it all.
I really hope that the whole Hand of Henrin series will come with the same good qualities.
Kudos to the author, Stewart Larsen. 8)

Do you ever run these games online Yaz? Frankly, I find the format of the MMRPG very challenging to run, and it would be instructive to see someone who is experienced and comfortable pulling it off.

Considering that, during the last 15 years I moved five countries in three different continents, you can understand how complicate it can be, for me, building up a reliable group of players enjoying face to face roleplaying (that is always the best). As a contingency plan, I do play and run games on play by post, including these adventures (Blackmoor Living World campaign, of course based on the MMRPG adventures, started about two and half years ago and is still going strong).
If you are interested, I posted some report and campaign journal on this website: viewtopic.php?f=76&t=8800
If you want to join, just follow the link: https://www.rpol.net/game.cgi?gi=70496&date=1589938492