I don’t think they necessarily lied, at least not completely and was always very open to interpretation.
They stated their intended goal was keep customization but functionally nuke everything else. But if the customization is tied into that “everything else” then I can see them as viewing those necessary casualties to their intended goal.
Because, based on what I’ve read, the customization stuff could come work they would just heavily require rebuilding to fit the new limitations which, as I stated, was something Blizzard probably expected as opposed to everyone just giving up and making the situation far far more dire.