Same here. Just yesterday me and my friend ran a couple of missions on Challenging and they were so easy we were debating kicking it up to Heroic. Then today...yikes.
lol did Jeffeson Trade last night and had 4 gold grenade throwers spamming us with grenades from the catwalk in the planetarium with two brutes on the botom floor with us...wow and Ai just running around the room like headless chickens.