I know the feeling bro. The superuniques have much better chance of dropping but rare.. so far I oso haven't gotten it.
Yeah it's broken but some ppl damn lucky to get it ( you know who you are  ). The plans I got at 1st kill Malthael. The mats, I can't begin to tell you how many times i've killed Malthael. I went all the way up to T3 but still....