The post goes in to detail as to why tier-2 epics are overpowered from a damage output perspective and not enough damage absorption. The crazy part is when he compares a blue equipped mage versus a blue equipped hunter, or the same pair wearing MC epics - the mage can crit for 38% and 42% of the hunter's life, respectively. A BWL equipped mage can score a 71% crit on the hunter's hp. That is insane!
The poster also goes on to mention various ideas to bring things back into balance, which I applaud him for! Nothing will get a problem solved faster than having a solution attached to the complaint. While I think this isn't something we will see fixed quickly, hopefully Blizzard will take notice before they release the expansion (one of the solutions).
I also liked the idea of changing spell resistance to be more of a partial blockage of the damage (similar to AC and melee damage) rather than an all or nothing deal.
Kudos to Arash for such a fine post.