Thinking of putting this in the freezer for a while so aiming to gifify the current state of things, this is one of the workflows that should look nice and flowy.
Bottom floor has painted rooms, rest is auto generated. This kinda concludes this phase, it merges the solver with a paintable interface, letting the tool gradually go from manual to automatic control. Normally this is the the time for feedback but in the absence of such it's instead deliberation.