The changes view has a great diff part. This diff shows the changes between the previous and the current revision. However I sometimes have trouble telling both apart. This might arise from using Eclipse, as in its diff view the order is different. (Don't pin me down on that, it can switch sides to add to the confusion).
What would really help me is some additional information in the diff part. Annotate the header with a commit date and/or the author. Or just adapt the tab title to: Changes of File (Modified, old-sha vs sha current).
Customer support service by UserEcho