I developed for fun this simple program that read a save file and dumps its content into a more friendly format.
Not all fields are decoded but we can take that incrementally ( with your help of course )
you can download it here:
https://github.com/OpenNingia/tesvsavedump
You will need python 2.7.2 to run it, all the instructions in the README file
It can be a valid start to reverse engineer all the save file
PS. I'm not aware of another tool to do this, if one already exists then ignore this


