Support incremental DB Deployments in VS.
James Nail commented
Doesn't this already exist in VS 2012/2013 SQL server projects (SSDT)?
This would allow for comparison of two databases (source vs destination) and produce the incremental DB schema diff scripts to make your destination same as the source. You could review the diff script and then allow the deployment to happen. It will warn you in case there is any possibility of data loss.
Steve Smith commented
Can you describe what this would include?