Gilgamesh really is getting major fleshing in this show, compared to FSN (game included). He was left pretty superficial in FSN, despite being a major villain. Although he's so pure and simple that even a superficial observation hits very close to the mark. Compared to Saber he certainly acts more like a king. I suppose his little conversations with Kirei are now ending with Tokiomi finally deciding to take action (and thus relieving Gil from his boredom) and Gilgamesh himself probably thinking he did all he could to lay the foundation for Kirei's betrayal. In any case Gilgamesh is made to look far more intelligent in this show than FSN.

It was nice to see the old Emiya mansion. I bet Shirou had no idea even Ilya's mom lived there for a short while. The sudden appearance of the magic circle that summoned Saber in the next war was given a proper explanation here, which might be the most important detail of that whole part of the episode.