Desperately, TB needs a toggle button: subject or sender on top in the inbox view. I personally prefer to see the sender first and the subject line second as I recognize the sender very quickly and sometimes have no need to check the subject line as I will delete it immediately or mark it as read.
There should be a toggle button so people can switch b/n the two options. Even in the desktop version, I will rearrange the columns so the Corresponder is before the Subject column.
Thanks