Goblin event completed....and what a disappointment

I completed the goblin event, thinking surely there is something higher GA tier that drops in all these loot caches..nope. I opened all loot caches at the same time, the best I got was a 2 GA piece the rest were 1 GA or straight legendary with no affix. Even the runes sucked, barely any legendary runes. Sure I got a spark but I already have 15 sparks that doesn't do me any good. What a disappointment. You would think they guarantee you a 4 GA unique for your class, I would even settle for a 4 GA Legendary. Vent over.