I'm in the Aztech mansion and have the door open for the North stairwell, there is an exit box there but when I click it it doesn't respond. Do I have to do something else first or is this just as far as this goes?
Otherwise, this is one of the coolest, most bug-free DLCs I've played, Oh, except Dances With Clams Shop has no exit and I'm playing a mage. LOL Thanks.

Hey moshark. Give me a day, and I'll take a look. The shop exit should be easy to fix in theory.

https://www.youtube.com/watch?v=h0vpUQT83Jw

Did a dev stream going through the sections you asked about. Magic Shop entrance fixed. Aztech Mansion is working as intended. Watch the video for a full run through of that section.