Thanks for the offer! Already playing in an Avernus game that Naat here is running :)
I've read/heard that there are some major flaws in Descent into Avernus, but there are also easy-ish fixes. One solution is proposed by the amazing Sly Flourish in this article:
https://slyflourish.com/running_fall_of_eltruel.html
I haven't read much about it since I'm a player but I do happen to own the DMs Guild adventure he is refers to in the article, The Fall of Elturel. It was one of the covid-19 freebies. It might still be free, but if not I can send it your way. There are other articles out there "fixing" the adventure but again I didn't look it over much. Naat will be a good person to talk to though, since he is running it.