It's not just bug fixes, they've included a number of new features:
- 3+4 part name resolution through a new feature called "database references"
- File groups and files are now part of the project settings and can e fully parameterize then to fit your deployment needs (this replaces the need for the storage deployment script)
- SQLCMD variable support; this is enable through a new project property page for creating and editing variables that you can then use inside your scripts. Variables are stored inside the project file and can be mapped to MSBuild properties.
More details will be coming soon, but in the meantime check it out.