I really, really, really hope all that sudden nobility doesn't happen - classism as an issue really adds a lot to the show, and it would add a lot to why Arthur's a great king, so I would really love to see it present in Arthur's reign as king. Even if equality is inherently impossible with a monarchy, it's still a nice thought that Arthur's greatness is because of his accepting people on merit rather than blood.

As for Gwaine - we at least know he's going to come back at some point in the series. :D