I ran it 3 times at Gencon, none of my parties took the deal. Dropped the terra cotta fight every time as optional due to time constraints, and I don't feel that anything was really lost by doing so. Mostly because I spent quite a lot of time with the "walls" interacting with the pc's. Turned out to be a great way to get players, even shy ones, to talk and tell about their character. It built a lot of immersion and really made the final decision and fight a lot more of a moral quandary for them. They started to realize that the entity wasn't malign and they didn't want to harm it, but knew that otherwise Wulessa was gone.
On the 3 tasks, I had one group roll high and figure out the defender was likely a div. "hey wait, div fly (really really high knowledge planes) no way were fighting that on a rooftop". So they took it to a basement. As a gm, use the first round of smoke + invis, and then minor image to make them think they are fighting more enemies than they are. I didn't really damage the party much in that fight but they were convinced they had a small army of outsiders against them.
