Branch Merge Comments

It would be nice to have a feature that a comment box to the merge process for branches to captuer input from the data modeler to enter a summary of changes.   These comments could then be exposed in the manage revisions views of a project to provide a quick summary of the revision.  

Why would this be helpful.  We have a model that has over 200 revisions and when you look back over the changes it would be really helpful to get a quick summary of changes for each revision to help identify when a change was introduced!