The flashback episodes kind of annoyed me, and I'm glad I've been watching this on a binge rather than a week at a time. While Kiristugu's past is interesting, it seems like a poor idea to just drop it all at once over two episodes. I feel it ought to have been interspersed here and there, in little few minute scenes, as we proceeded onward.
Also, Lancer's
I absolutely loved it.
As for Chaore's comments on Berserker's master being able to control berserker, I suspect part of it is that Kiraya's kind of a berserker type himself. He completely gave up anything resembling safety or longevity to get this one goal. My suspicion is that this gives him kind of a kinship with Berserker, and he's able to exploit it to a degree. Master and Servant synergy is kind of a big theme of the series, so I am seeing it as a manifestation of that. Hell, at this point, does Berserker even care about the grail? Did he ever care? Did OG Berserker?
In regards to the new episode, I am amused about Maiya
Finally, Gilgamesh status: Still The Best. Watching him relax around Kirei and act casually rather than regally haughty is always amusing.