I've only had a chance to read this module in hopes that I could run in at a future AL event I run at my LGS. I have not had a chance to run it yet, but I do feel compelled to commment on what I have observed in just reading "Back to the Burning".
This is a great, rich, story; an obvious committed effort to create a fully immersive continuation of the DDEX 2- series adventures. It is plain to see that Jeremey Arnold did his research to make sure this adventure's insertion into the stories timeline is smooth. He gives DMs alot to work with.
It is an awful lot to read. It is clear to me that Jeremey is a proven writer and wants to leave no element of his characters or this adventure to question. Because of that, I felt that I had to get through alot of descriptive to get to the main points of the adventure. The box text adds more to the immersion and unfortunately more to the reading. But, I want to beleive that the author already considers this in the estimated durations of each part of the adventure.
I observed what most others have pointed out. You'll definitely need to let players know about the limitations of the dream sequence. Some may see their agency taken from them. This adventure will take some trimming to make it work as a stand alone adventure. I intend to present the ending like a cliffhanger ... while meeting the spirit of what Jeremey has presented.
It will be interesting to present this module under D&D AL Season 8 Banner, but because of the effort Jeremey Arnold has put into this product, it is one I am willing (and wanting) to try. I may update this feedback later, but wanted to get these thoughts down while they are fresh in my mind. Thanks to all involved in bringing this author's work to life!