Just checked them out, all three new Jagdpanzer have the incorrect tanks.
Instead of beign modeled with their appropriate Sfl.ZF gunsight which were carried by assault guns and tank destroyers, they just have the same sight as the other tanks carrying the respective gun in game.
The Hetzer and the IV/70 carried a fixed 5x magnification Sfl.ZF 1a, in game the Hetzer has the same 2.4x fixed sight as the Panzer IV H and the IV/70 the 2.5x/5x variable sight of the Panther
The Jagdpanther had a fixed 10x gunsight while in game it uses 2.5x/5x variable sight as well
While it doesn't matter that much for the IV/70 (just inaccurate), it's a huge handicap for the Hetzer.