After sending a message Im taken back to the list of screens that lists my inboxes. Why on earth would I want to look at an SMSG inbox after replying to an email in my normal inbox?
Also, for those of us that keep a clean inbox, its now hard to manage. Delete now goes up to a more recent message. This means that I cant start going through my messages from the most recent email. If I see an email I want to keep, go to the next one and delete it, Im back at the email I already read. Either make this behavior optional, put it back, or use smart behavior to side which direction to scroll.