Since they were G+ blocklists, they were obviously on company computers. OTOH, it's not clear (despite the lawsuits characterization, which is pretty directly contradicted by the posts and emails offered to support it) that these were motivated by ideology rather than disruptive manner of expressing that in the workplace. Moreover, it's not clear they they were, in fact, used for any problematic purpose.
> Discovery could go wrong for Google in a million ways
Which is why there won't be a settlement; it's clearly a politically motivated suit aimed to hurt Google as badly as possible; if Damore and the other individually named plaintiff were seeking to maximize the probability and magnitude of personal recompense, this would be a direct action. A settlement with no admission of guilt, no discovery, and just a go-away cash payment that’ll mostly be assigned to the attorneys won't achieve the goals for which they are filing the suit.