Woah, everyone received a full deck of cards complete with Epics and Legendaries for the first new class ever, and people are actually playing it less than two weeks after release? Truly extraordianry.
• "Players love to play a brand new class and level it up!" - I get it
• "It's a brand new OP AS HELL class!" - We all kinda got it, right?
• "Players love to play OP decks even more than new ones!" - You may get it.
• "Players love to farm wins with OP decks in CASUAL even more than doing so in LADDER since they get the chance to prey upon actual non-competitive decks (just a little, admittedly) more often!" - You really don't seem to gey it.
One last thing: imagine if Demon Hunter decks had proven to have the same power level as KofT's freeze shaman or new-quest-warrior. Following your line of thought everybody would have played it regardless, right? After all, all the players are after is exploring the new class, the new cards, unlocking the golden portrait and basic cards, ain't it?
Look at the image is self explanatory, if you think is OP you are wrong.
Weird how at least 3 out 4 of the decks (I wouldn't know for sure about rogue) are precisely counters to demon hunter, huh? Kind of a reminder of prenerf galakrond shaman, isn't it? When after a few days of it having ~70% winrate and >50% playrate, the winrate dropped and the other rising top tier decks were, surprise surprise, direct counters to that deck, such as face hunter. How odd...