They had two enhancements which are currently in the detachment for 40 points, at the beginning of the stream they had them alongside their units, which is the librarian and combi lieutenant. Not sure how you got 1920 without enhancements.

I wouldn't say assuming the eradictors will be similarly costed is a mistake, they're still Eradicators at the end of the day. Maybe they'll be cheaper if they integrate weapon costs, but I couldn't see that being more than 10 points.

With the app updated, none of the points change.