So far I think most of the concerns we have read I things that we are aware that need fixed or are bugs that we will address in time. We tried to not change the site unless the change helped make the site device agnostic. While we realize that when their are aesthetic changes we won't be able to please everyone we do hope to please most. As the web becomes more "responsive" you are going to see that websites will start to look more and more alike until their are more diverse designs and methods developed that allow them to be responsive. We are still in the early stages of the web becoming mobile.
Our programmers are working hard to make changes and fixes and if at some point today we feel that we cannot quickly get to enough of them we will probably roll back to the old design in order for us to have more time and to prevent as minimal of disruption for users as we can.
In terms of the new inbox layout, I find it rather frustrating for a few reasons. First is that it is no longer as easy to see when a message that may have been read, but haven't had a chance to reply. Second, and more important, is the difficulty in responding to messages; when composing the box appears over the other person's message and it's not convenient for trying to completely respond to everything in a message a person has sent when you can't scroll back and forth through it, especially when the messages are lengthy as my correspondence tends to be. If you could find a way to make that aspect device friendly, but still be able to see/scroll through previous messages, that would be very much appreciated.