Haven faction discussion.

But perhaps the developers decided to specialize the faction in attack (although that's unlikely).

They threatened to specialize it in defense, based on what was written in those PDF files. In this regard, there should be certain unique skills, and the creatures will probably be more or less resilient, but not the most proactive. Of course, you can build tactics on the battlefield in any way, besides, in the fifth installment, Haven was a purely combat-oriented faction and could afford to play both offensively and defensively.