Friendly reminder. Madness. It still exists. And right now Madness sorcerer is the absolute bottom of the barrel.
Extremely squishy, lifesteal is useless(particularly in PvP), lack of mobility(thanks to Force Lightning), burst is pathetic, mediocre tacticals, single-target(sustained) is pathetic. Lightning has superior sustain(especially with Lightning Barrier), burst, mobility. And the same goes for IO.