I saw nothing wrong with the ep, at least, v0 or not. But I suppose the real version might then have a better image quality. It's no BD level for sure with this but I see a lot worse every week with certain other shows.
This arc continues really strong. Not even the kind of lapses in logic like the keep Mikoto from the pole scene in the previous ep. Instead we did have very varied magic in a decent fight and some surprising development as well. Jolly good.
Of course the combo family dinner at the end crowned the episode. Watching Misuzu makes me wonder, though, from where Mikoto inherited her personality. Her mom hardly seem tsundere. Although she certainly demonstrates why Touma should marry Mikoto: She will still look no older than an onee-san 20 years from now...
Mikoto hesitating to deny being Touma's girlfriend was hilarious to watch. Man, such sweet scenes in this arc.