Well, Beat, in the event that AS could air an awesome "for-adults" anime soon, would you rather have it or Kekkaishi "take it on the chin"? I don't think UFC fights have anything to do with mediocre ratings, but I do think the Memorial Day weekend will adversely affect ratings unless Brotherhood's ratings pick up following the break with Anime1. If Brotherhood starts pulling down 500,000 or 600,000 after episode 14, Kekkaishi might start off pretty well. But if Brotherhood doesn't quite reach that mark, Kekkaishi will definitely be in trouble from the outset, and it's likely that Kekkaishi will not be promoted in any way, shape, or form, outside of a Sunday bump if it is lucky.
Though if Kekkaishi miraculously explodes out of the gate I foresee a schedule shuffle to screw Kekkaishi over as much as possible, because I don't think Kekkaishi was originally in the cards, and I think AS wound up getting it as part of a Viz package that included Final Act. So I think that we could wind up getting four anime this year.
Frankenhole looks iffy to me, personally. Doesn't look like it'll outright suck so I will probably catch the first couple of episodes before making up my mind for certain. But AS originals have been disappointing me lately other than Titan Maximum and Venture Bros.