Ragnaros was not tauntable, the mechanic was based off of a tank being in range. If a tank died on Ragnaros you assuredly lost 1-3 dps because of the transition between the melee backing off and the offtank running in. I'll actually start looking for old school videos to see if we can't find out how it really worked.
As for the comments about the game being easier now because the strategies are known; that's inevitable but also a concern for some of us who enjoy tough end game content. Scriptcraft wasn't even remotely close to perfect, but the scaled values in BWL made it tough and fun. I'm all for them continuing to increase the difficulty of raid mobs so we can extend the longevity of the server and give people an experience similar to how challenging retail was when we were all shit.