This is very true, but Kennedy, unlike Punk, is already a "main event" player, proved as much by his matches with Batista.
Kennedy is someone who will be a champion by the end of the year. They will build up Punk more slowly before he becomes a champion.
Kennedy going over Punk makes sense to me, booking the two of them in a match doesn't, i'd have held it off.
EDIT: I've just re-read the results, Punk is jobbing to a hanging neckbreaker? It better look like it damn near fucking killed him if they dont want to destroy is heat.