@Phaedrus, those feats are just random homebrew on the site. The forum and the pdf are the best place for feats. The flaws are fine. Just remember to roll the % yourself.
@Nanshork, your call. Some people think flaws that are irrelevant make more sense, because a person would work around there weaknesses. Some people think that's cheesy.
@All, yes, Book of Elements is a-go. Most of it's actually in the pdf. And yes, Elemental Bodied, especially the para-bodied, are fun.