I would agree with you Tehtsuo, although I would think that this change would make things easier for those of us who are interested in progression. In another 8 weeks, TBC will be a ghost land, and early blue dungeon drops (pre level 76) will replace even the best T6 gear now. I think that Blizzard may be using this as a caveat to appease their large consumer base who may have always wanted to "try" things and NPCs like Illidan, but have been unable to either due to their inability to progress, or inability to deal with some of his mechanics (e.g. shear). I would say that overall, this is a positive move for Blizzard, although some may see it as Blizzard dumbing down encounters en masse. Again, even if they made the bosses only have 30% of their current health (instead of a 30% reduction), I don't think it will matter much in another 8 weeks.