There is nothing wrong with your enhancement request, just that we missed it among the rest of the active bugzilla entries. Then again, this particular issue is not a priority for the EMF Compare team as there are more pressing bugs to handle.
We are open to contributions though, and we look at contributed patches asap. So if this issue is important for you and you want to try and tackle it yourself, please do. You'll probably have to look in the direction of our org.eclipse.emf.compare.diff.FeatureFilter , since we probably filter out the differences on EGenericTypes.