Feature Request: If possible one thing I would like to see is better consistency for replacing files in file and image fields. This is a task that content editors have to do constantly, so I would like to make it dead simple and obvious.
Here is some quick mockups:
For image fields:

When the "Replace Image" Button is clicked, a modal dialog pops up.

For File Fields:
Same thing...It opens a dialog to replace the file

What do you think? I'm not sure what it would take to code this, but I thought I would throw it out there in case someone is interested.