I'm watching it, because it's Genshiken and I always loved that series. I even rewatched the previous seasons before this one, because it was so long ago. Things have really changed since the first series... I think the most weirdest thing about this season is that many of the old VAs has been replaced with new ones, some of them that are almost completely different than the original ones, which can be really weird at times when these new ones try to imitate the old VAs.
As for it turning into a BL thing, it really kinda makes sense. We had a season where we focused on male otakus and otakudom in general, then came the second where Ogiue happened and there were suddenly more female characters popping up and whatnot, and since the series was always similar to a documentary about otaku, it's pretty much fair that it focuses on the other sex/gender as well.
As for the trap thing, I don't really think it's really just that, but it feels like a more realistic situation (at points) when it comes to people like her. I've never seen a series where the context was explored like this, so even if I'm not into the trap thing, it is quite interesting when it comes to this deal. I've always loved how Genshiken usually showed the otakudom in a light that is not positive nor negative, just a thing that is a fact and I'm seeing the same approach about this deal as well.