View Uncommitted Changes
I like how SQL Source Control can show you that there is an uncommitted change to an object with a blue dot on the object. Could this be built upon by allowing users to right click on the object and then have an option there to show a diff between the current code and what is committed to source control? This would be the same results that you see when you go to the 'Commit' tab and select an uncommitted object. It would be very helpful to see that comparison easily.
Especially as it takes ages for the commit window to show all results ....