I haven't played much constructed lately because I just don't have the cards or dust to make a fun new deck, but the arena is super crazy.
The other day, I went 12-1 with an aggro Shaman deck based around Jeeves and Hobgoblin. The Hobgoblins did surprisingly well. At one point, I was just putting down too many threatening low cost cards and my opponents had no choice but to leave one or two Hobgoblins, leading to things like a 5/5 Novice Engineer or a super bulky Jeeves.
It's a lot easier to get your board to stick around because the extra padding from the new cards has made it harder to get a ton of aoe clears.