I disagree, while you never get scenes that explicit later on, the specter of rape is pretty prevalent.

Probably the most prominent example, and I suggest anyone who has not watched the show avoid this as it's entering spoilers, when the characters come across the Sword Maiden and you start too learn she too was a victim in the goblins, and it explains a lot about why they were called into the the city too begin with.

Also knowing what the goblins do to their victims, a certain level of depravity is added when you see them using those women as human shields in the final two episodes.