I agree with the other two comments left here; while I am glad to learn more about the German guard and their fighting styles, histories and relationships, these fights were a lame way to do so. I'd have preferred it to be done the way it was being done so far; individual guards getting to shine during plot-relevant moments.
Tho the Immortals really aren't weaklings; remember it is the Guard who are superhumanly strong here. God's sake, Cassandra has diet sharingan!