If this map actually represents the dominant national ethnic/linguistic affiliation in the border regions, it may actually represent ideal borders for Ukraine that would help preserve the nation's independence in the long run. But, as others have said there is no chance that NATO or EU members would begin carving up Ukraine, both because of their support for Ukraine in its conflict with Russia and because NATO expansion at the expense of Ukrainian territory would be seen by Russia as a threat and increase the chance of conflict with Russia.