Right so in TBC when they introduced the 51 point talents, alot of complains were made about chaos bolt, i think we all remember the changes that went through... First off ignoring all immunities and absorbtion effects.. that got nerfed quite fast... then we got the mental chaotic mind buff from it, which got removed quite fast... then it got buffed in dmg... nerfed massively in dmg and buffed up to the orginial dmg again... so basically it went to being a fast cast incinerate that dealt heavy dmg, good for pvping to pierce absorbs and finish off those annoying disc priests, pretty decent for pve due to the lower cast time and ignoring mobs absorbs.... So what does blizzard choose to do now.. remove the ignoring of dmg reduction of a target.. so there you have it, it is now a glorified incinerate...