I dont agree, i think there is still enough diverse tallent to make it interesting. I mean sure, there IS a lot of copy-cat bands, but some bands are putting a good spin on an old formula and making their own unique music.
Of course there a going to be similarities as a lot of these current run of bands are influenced by earlier bands like Luna Sea, X-Japan, etc like Peter said. As much as i love Diru, they also leaned heavily on those earlier VK bands (specifically Kuroyume), but have now carved their own path.
edit: Thanks for that list apunno, i'll be sure to check some of those out!