If what you`re saying is correct and some of the new raid fights punish mistakes from single players that`s good. But it`s also the first time really since TBC, so about time. In WotLK in particular, half the raid could stand in fire and you`d still down most bosses.
But again, it`s not just raids. Like I said earlier, it takes five times as long to level to 60 in vanilla on a x1 private server than it does to level to 90 on a retail server. And that`s without having a level 90 character handed to you by Blizzard. It`s just totally unacceptable, and it attracts the worst kind of gamers. Pointless professions, pointless 5 man dungeons - where you used to learn how to play the game in classic and TBC -, flying mounts removing WPVP and on and on. And the things that haven`t been nerfed have been made "convenient" so nobody ever has to put any effort in to do anything. And even if the raids were now made suitably hard again they`ve still been nerfed because you don`t need to farm for them anymore. And this is not MMORPG, whether you like it or not, and should stop marketing itself as one.