Chapter 20 is in Beta. There is only one Chapter expansion somewhat early in the Chapter, the second one is near the end of the techs. Not much help there, since we have yet another new boosted manufactory that can't fit into a single expansion. Not much space left from one single new boosted goods, even with the new scouted province expansion plus the early chapter one. I don't see a lot of sense in getting an expansion in the last couple weeks or so of a Chapter.
I was excited when I saw the notice about a new technology and thought we might get a floating city, basically like WoW's Dalaran. Now I notice the Spire has been grounded with a new island behind it.