Eh, that area was first included in Macedonia in Roman times at the latest, even if the Macedonian national identity is a pretty new one (though it's over a century old itself now). I guess I tend to see these things as kind of arbitrary and changeable anyhow - so to the extent that is silly, objecting to it on the grounds that "we own that name" is also pretty silly, and I'm glad the countries' governments have come up with an actual solution.