In this episode, Illya gets to chat with her returning mother in the bath. Could that be considered as fan service? Meanwhile, Miyu along with Rin and this other blonde girl (I find her annoying and not worth mentioning her name) fights Berserker.
I'm not that impressed with Illaya in this episode. But the action part of Miyu is great along with Illya's mother doing some funny moments. However I think this story part could have been executed better because something feels off or weird to me at least. An example is the bath scene in the middle of the night for the entire time. So anyway, the episode is alright overall and I can't wait to see what's going on next.
Conclusion: Nice action but the other part of Illya seems awkward.