Peggy seems totally confident and comfortable in her own skin, which is great. And Pete is the same entitled man-boy that we all love to hate. Usually we want to see a character grow in some small way, but Pete actually seems to be regressing.
Is Joan really going to leave Sterling Cooper? I can't see it.
A commenter on Feministing pointed out that Sal being late to the meeting the next morning could imply that he did, in fact, meet back up with his sexy bellhop. A possibility that hadn't even occurred to me... go Sal!