Its been a month since release now we will of had 3 nerf waves. Some people will say Team 5 are balancing the game according to the stats. The meta has not really changed over a 3 month period with Warrior, rogue mostly at the top. With the introduction of Demon Hunter a new class that mixed up the meta DH meta mainly first 2 weeks to be honest. With the latest patch buffs. nerfs to a lot of cards to be honest the answer is they DONT know what they doing. Any game with so many adjustments in a short time is in trouble with game mechanics etc.
The next wave is next week with certain class types being buffed again and they may see some more game play. Overall they wont change much the meta is slowing down so a new cancer may arise from the ashes of outland the Priest. The class has no interaction minion wise, same with mage which is another class which will rise. The hunter arch type which there are many will see play with the same old Demon Hunter, warrior, rogue dominating after a week the patch hits.