KK first of all for people saying they hate how major characters are dying, i agree. But we left out one key component:CoT!!! For all we know there could be an instance that either attempts to stop Illidan's death or attempts to revive him. Don't ask me why. Maybe without him mag escapes. Maybe he formed a pact with terrorists saying they had to stay away as long as people who have enough time to get T6 gear don't kill him. Maybe Blizzard got so much bitching they had to somehow fix it without removing game  content. More importantly, "killing" Arthas is most likely going to be open ended. Like get him to 10% health and having him stun the entire raid for a minute, spew out random crap for 50 seconds, and have Anub'arak swiftly take him away(unless he is a boss) :/. Well if thats the case then maybe he'll summon his feet and walk away. If he does die without getting to 10% health, he'll prolly spew off stuff like overmaster Pyron or whatever his name is does in front of BRD(like bwahaha... my master will never let me die something something ILL BE BACK). so basically...ya.
BTW Froustmourne will NEVER be a pally weapon seeing as deathknight's are the EVIL COUNTERPARTS of pallies. dont get your hopes up. Prolly be like + 1000 stam -10000 spirit.More more more importantly Illidan is still a virgin.