au.pc.gamespy.com/pc/world-of-warcraft-wrath-of-the-lich-king/872778p3.html
Kaplan believes that having Naxxramas as a new 10- and 25-man introductory raid serves a few functions for Wrath of the Lich King. First, it lets the vast bulk of players experience what many believe are some of the best raid encounters Blizzard ever produced. Finally, it serves as the start of the new "two-tier" raiding system. Going forward, all raid dungeons will have both 10- and 25-man versions with their separate itemization lists and progression tracks. There will be no attunement requirements nor will getting into a 25-man raid be dependent on any 10-man raiding.
There will be a 25 man and 10 man Naxxramas. I was all for lvl 80 Naxx since it fits in with the game story but 10 man Naxx?
Now you can go through and defeat two of the most powerful warcraft characters in 10 mans, Arthas/Lich King and Malygos.
I'm all for have two seperate tiers for raiding but at least give up different content or at least aq20/40 (even though they were horrible instances). Having the same bosses in 10 mans and 25 mans is just plain stupid.
Have instances for the raiders with harder bosses and better loot and instances for casuals but the tier gear is X.5 whereas the hardcore content will be X.0 gear (ie hardcore instance has tier 8 and the more casual tier has 7.5).
Once casual guilds have finished the casual instance they can have a shot at the hardcore instance or move onto the next X.5 instance. Hardcore raiders can do the casual 25mans on days off on if they feel like it.
But having the same boss as a 10 man and 25 man instance just ruins the story. And no, Kael 5 man is not the same. The 5 man Kael is him after his defeat in Tempest Keep. Lvl 80 Naxxramas fits in the story because it has moved back to Northrend and will not exist as a 40 man instance anymore.