Trundle is indeed broken-tier right now. The pillar of filth, now pillar of ice, was already omgwtfhax in the right hands, but now he has the rework on his contamination, now frozen realm or whathave you, which makes his passive and ult absolute trolly, master level troll with that bonus regen item. Combined with a new minor slow on his q, he's literally a god in the jungle. He just needs to run into your lane and if you don't use flash right, he's virtually guaranteed to catch you from the slightest misposition.
Also, quinn buff actually makes her somewhat viable now cause of mini-stun.