While going thru my bags i noticed that i was carring lvl 15 gear. "where did those come from" i thought. i hadn't done any low lvl rifts or monsters, then on my next rift i looked carefuly at the loot. LVL 15 gear from a lvl 49 rift. what the heck is this?

Crafting rifts. noticeable drop in rare and epic goods from the rifts after 1.4 release, not to mention plaq's
(why will the chance for an extra plaq from bosses not proc for crafting plaq's)