Tl;DR: I think they haven't worked on Engineering yet. Engineering is just one broken spec, while other Advanced Classes were broken in one aspect of the game. They should start working on Engineering now.
That's what I'm thinking as well, they basically fixed most (all?) other classes and specs and they will hopefully focus on us for the next round. Hoping to get some detailed answers this time around even if we know their answers are usually thin on details.