provide a version history for each file
Being able to immediately jump back to a previous save point w/o having to commit an external repo would save my bacon regularly. NetBeans has this and it's the one major advantage. .
Dave Wintrop commented
Isn't this already there?
1) Select file in Package Explorer
2) <Right-click> and select "Compare With" > "History..."
3) History view will open and show all revisions. Can replace changes from there.
Is what you want different than this?