Mac OS Yosemite: please give us better filemanagement

When copying files to a folder that already contains files, Mac OS still comes with an incomplete list of options to handle this:

What if we want new files to be copied, but don't want to replace existing files?
In that case, Mac OS cancels the operation!

So, Apple, please add a 'Merge' button. Or call it: 'Only new' or 'Copy new', or 'Keep existing'.