I could see the new 3/4, that allows the hero power to be used after every spell, be included as a "one of" in control warrior and zoo paladin type decks. Warrior being able to armor up an extra time after using shield slam/ slam/execute could make a huge difference, and spawning more 1/1's after using paladin 1 mana buffs could help maintain board presence without vomiting a hand full of cheap minions.
I had a lot of success with a buff paladin deck in gvg/tgt era by using my hero power every turn to increase volume of buff targets, especially in control matchups. I only played to rank 3-4 with it though.
edit: I hope they make cards like Reno part of the classic set, or somehow exclude them from the seasonal purge.