Heroes 5.5 WarGame Edition - Tactical Edition.

I understand. But it's still a shame. I would have preferred anything over removing the Knights, even if it meant sacrificing balance. Even replacing them with Liches would have been better. The Necropolis faction really needs Knights; they are sorely lacking.

You're judging based on the G5 version, not the G5 WGE version. In the original game, at level 6, the Necropolis's decorative units were essentially useless, lacking significant abilities or any distinguishing features. At level 7, they were even worse, offering very little for their high cost. That's why I also had a negative opinion of both of these units and complained about why the developers removed the Knights.