I've gotten almost every set plans, about 9 pieces of blackthorne(4 of them are belts), 2 of the skeleton rings, 1 traveller something and one danetta xbow(which was the one I had as a lvl 60 version, so that was kinda nice even though since the other one is 67 the set is still unusable for combat anyway so not particularily useful upgrade). Only class set item I found was a natalya during 2.0 but since RoS I haven't found a single one. It's kinda annoying how you can't control or influence what's gonna drop at all. On my crusader I got like 6 one handed weapons and only one two handed, I also got 3 mempos, 5goldskins(2 of them were gambled), 3 aquila as legendaries.
Just the way it is but yeah it's frustrating at times when you keep finding the same shit, and it's well, shit. Blackthorne especially, because pretty much every fucking blackthorne is shit until you reroll it, it simply cannot roll good stats because the forced stats are shit on it. You can make decent blackthornes with rerolls(belt/chest/legs mostly iirc) but not without. The set bonus is alright I guess if you can fit 2 pieces, but it's hardly worth it if you have legendaries with affixes in the slot because they're all pretty much going to be better.