That and a way to recursively commit/push (i.e. make a change within a submodule, commit in one step with the same message in the parent submodule).

Right now, if you want to push a change to a file in a submodule such that it propagates to the users of your repo, you have to:

1. Change the file

2. Commit within the submodule

3. Push the submodule

4. add the submodule change in the outer repo

5. commit in the outer repo

6. push the outer repo