When you burn down Potemkin village of course there is a loss. Potemkin village ceased to exists and turned into ashes. You lost one illusory form and gained another illusory form. And unity of existence encompasses illusion which exists, too. This is exactly why I'm saying that, while what you call "enlightened standpoint" goes beyond good and bad, it is not nihilism (it contains it but goes even further). And just for the record, Platonists didn't see the whole picture.
In other words -- since nihilism, Platonism, but also e.g. neo-advaita and many schools of yoga consider illusion as less than absolute, it's obvious that they still hold to values. When you drop all values, there is no difference in value between illusion and absolute. They are one and the same. And of course one is one with it all as well.