What messages have I, or haven't I already seen

My biggest complaint is not being able to see which threads and/or responses I haven't looked at yet. I was afraid that would be the case when you announced that you would have a new format. With the old format it was clear with one glance.

This format is so much harder to maneuver, with several steps required to do what was a one click process.

I don't understand why a change was even necessary.