I've been a big fan of arcane explosion for awhile now, card is just invaluable against zoo and paladin, which there are always a lot of. You can't just say oh you can ping 1 health and be fine in those matchups. There are so many 1 health minions you can't ping them all, plus you can't afford the loss of tempo to use your hero power against those decks. Use it after an implosion or muster turn and it can really put them in a bad spot w/ having nothing to use all their various buffs on. In this meta I would definitely run that card, but who knows after whispers hits.