Doesn't matter what guild they're from, Nostalrius was good but it could have been better. Just like everything else can have improvements. It's the fact that they said to provide a Blizzlike experience on Elysium, it doesn't matter if you know how the encounter works. If you've played World of Warcraft long enough, even if you know the encounter you cannot go in there with half a raid and players who hasn't reached the level the raid was set out to be and kill three bosses within an hour of each other.
Do you see how many users are online on the Russian realm? It's dead, they probably log on and do the raids now and then but it's so easy it's not enjoyable anymore. There is simply no fun raiding anymore when there is no challenge. When people know there is no challenge, what reason do they have to play? Do you think Nostalrius had 10,000 online users on one realm because they all thought it's like every other server?
Valkyrie developers claim 7 years experience in emulation, they have a Russian realm from before, how can they not have thoroughly planned things before something like this was possible? Elysium will turn out exactly like the Russian realm once someone else comes by and say to provide a better "Blizzlike" experience. That's of course, unless the developers really do something to provide a challenge and set themselves out to do things differently than other servers. Because even Kronos was a roll, both Elysium and Kronos are the same you have no reason to chose one server over another.
I'd suggest they release the bosses gradually to make sure they provide a challenge. Otherwise it's very likely Molten Core will be done by end of the month and considering there isn't much competition, they would be fully ready for the next set of release while the competition has no chance to catch up.