There's a few minor bugfixes, but the one bit I'm super happy with is the singular part isolation stuff. It builds on the parting-out of model shapes and allows you to isolate a single part or sub-part within your model onto its own.
It starts with building out a model that has logically distinct, BOSL2-attachable parts, and when you want to isolate one of them, you set it to a global somewhere in your SCAD source: only that part will be shown, regardless of where it is in the child hierarchy.