With a second season already slated to come out in Fall, it won't be too long before we get to see more Mireille. She is my favorite character of Ars's gang. I haven't checked out what the fall lineup looks like yet, but I might try to give season 2 a chance. I ended up dropping the manga not too far in the future from this point. However, the adaptation has overall been pretty good. In particular, I have been impressed by the OST. So, I might end up liking the anime more than I did the manga.
It was an OK episode, I guess. A bit unfulfilling as a season ending episode, but I'm glad to see Mireille joining the ranks after showing her value, without lowering the value of the other vassals.