Damn, I never thought this show would go this far, but there's a whole lot more behind those Nomu's than we already knew.
The episode brought in some more clues, but also a lot of sadness for Eraser Head & Present Mic. Seeing as their once classmates turns out to have been the basis for Kurogiri. It's like he's one of the nomu, but in a different way.
The scene with them trying to get more information out was very well done and it gave them the slightest bit of hope. But then seeing as they are already experimenting on Shigaraki, I think they are already too late!