The way she acts and the deepness of the charater. Ben Mendelson did the same to a certain extent in Rogue One. She is phenomenal in Andor.

Domnhall Gleeson was a corny charicature of a villain in the sequel trilogy. Most of the General or Officer characters were campy in the sequels and terrible.

This series, with Denise Gough and the other Officers seem way more authentic. This show is AMAZING.