There is also the part where they write " However, this also means the difference between each level between 1 and 85 will be less significant, so you may find that an enemy 5 or 10 levels below your own will be a little tougher to deal with than it was before." Some old school raids may require more effort to clear, but right now many of the level 60 and 70 raids are trivial even for two or three characters. It might mean that you'll need to get to level 90 to clear the level 80 stuff next time around.