2.14 I'm not sure I like the current distinction between Keyword Traits and Keyword Abilities. Since keyword abilities are frequently referenced just as if they were keyword traits, doesn't it make more sense to think of keyword abilities as a subset of keyword traits? I.e., keyword abilities are traits with extra rules. Keyword traits aren't necessarily abilities. I just think this way because of cards that reference "your multiple attack" or "your reversal." (Not a huge issue.)
2.14.1.6 I would love to see Stance turned into a keyword ability. However, for the current rules (unless/until James decides to change it), it's exactly as it should be.
2.14.2.4 Are multiple copies still considered to be "placed" and _not_ "played" ? If so, there should be a 2.14.2.4.4 that says they are not played. Otherwise there should be a 2.14.2.4.4 that says they are considered played as soon as the multiple ability resolves.
2.14.2.7 This definition needs a line saying, "This ability is playable from the hand," because of the earlier rule about R's on attacks only being playable from the card pool.
Overall, I like the look and feel of this section. Keywords have never been clearer.