I'm the anon from last month and I wanted to be sure to say that I've definitely noticed an improvement on all the points. I think you definitely took it to heart and it's definitely showing: your characters seem present and tagging old and new CR without it seeming to overwhelm you, and it's been great to see all your commentary and thoughts on plurk, as well as the plotting posts.
I really don't have anything to add other than it's wonderful to see everybody around. In regards to Jamie, I've definitely noticed her around more, too. Understandably she's never going to be as social in threads as, say, Constance or Bucky might be, but I've definitely noticed her in threads.
So overall, great job! I love stalking your characters as well as playing with them, and you see to have hit your groove.