My take on the translation:
Spoiler:
I liked it. While the siscon thing was overdone after a bit and detracted from the chapter, it was otherwise pretty good.
I noticed that Zen said that Medaka's bro was normal until middle school when he became abnormal. That means that it IS possible for someone who was previously normal to change. Zen could be a late bloomer for all we know, though I'd prefer for him to stay normal and sane, while still kicking ass instead of becoming another crazy.
I'm not sure how much twelve hours of training will do for Zen. Medaka will benefit greatly from it, but Zen, being normal, probably won't get as much out of it.
Oh, it's pretty much confirmed that Medaka has a healing factor. A big bruise on her head (caused by a 30kg wrecking ball), according to her brother, should heal in 30 min... though how training can cause that, I don't know. I just thought it was part of her abnormal powers, but it could just be another weird part of the Medakaverse. Again, though, things are very inconsistent.
I agree with Arturro that the manga has been lackluster in its writing. Writing a manga and a novel are two completely different animals. In a novel, you have time to introduce characters and write their backgrounds and describe characters in detail. In a manga, you just have a picture with a few words and I feel he spent way too much time "explaining" in the bubbles and not enough time just showing us.
Plus, he did introduce way too many characters too early and then seemingly dropped them. It's one of the biggest reasons that Zen was lost in the shuffle. I mean, Onigase was introduced-- and then made irrelevant by Unzen. Akune and Kikaijima were introduced, given one chapter to themselves and then pushed to the back burner, after everyone thought they'd be major player because they were part of the student council. Of course, the council thing has pretty much been downplayed as well.
The manga is getting better in my mind, so I'll have to see where it's going to go from here. It was dead last in the rankings this week, but survived again it seems as Wajima was cut instead.