I really hope its an all Don finale. I feel like every other character is fine as they are. I don't need to know more.
I would kind of be fine with this, considering every character's last appearance since we saw them have been pretty notable (except maybe Roger). I would like to see a more definitive end for Peggy but her hallway walk scene was pretty indicative that she had a completely new outlook on life as opposed to the constantly focused over-worked Peggy who never made time for her personal life.
The only thing I could say for Roger is that maybe his office moment with Peggy was saying that he's handing down his wisdom and perspective on life to a younger, more viable professional like Peggy. I mean, Cooper is dead. Sterling Cooper (the agency) is dead. Could that mean Sterling (or just hist story to be told) has come to an end as well?