You need to allow the creation of angled curtain walls with Polyline-Chained method? Because until now, angled curtain walls were allowed only with Polyline-Single method.
This is a huge omission, and Revit already has this option for a couple of last versions.
I used to make a little trick by dividing this whole angled curtain wall into small straight segments and then making each of those with Polyline-Single angled curtain wall method. But this is only the substitute, not the real thing:
Essential! More flexibility is definitely needed to form more varied shapes. Hopefully they will introduce similar functionality to the shell tool in later versions now they have worked out all the algorithms to enable the curviness.