Small sample size of course, but early indications are that most of us are correct: Druids are now the go to class. I've just played variants of Strifecro's deck 5 out of 6 times. I've got the dust to craft a Warlock Giants deck which stomps (ha ha) Strifecro's deck hard but not wanting to spend my dust just yet. As always, immediately after a major balance patch, the meta goes into extreme flux and I don't want to craft a deck to counter something that won't be viable two days from now anyway.
Why don't you people stop trying to focus so hard on netdecking and flavor of the week and just enjoy the game? Not trashing you, just saying it's crazy to me how much energy some people place in min maxing a simple CCG. Since season 2 the ranking system has clearly shown that it's broken anyways (as in one month long cycles and the system just don't work), so just play and have fun. Casual is much better imo. I made it to rank 9 with this new season and just got bored. In ranked all you face is this netdecking ideology and "Druid is the go to class" and it's so boring. In Casual it's not like you just play shitty players and shitty decks, not so, maybe sometimes, but not really. You play good players with good decks, they just aren't super focused on min maxing to the extreme. You guys whine at Blizzard for treating this game like an MMO and using an MMO patch cycle, but you're doing the same thing in a way.
Yes Druid is even better now, by proxy of other classes being nerfed, but it's not the only thing to play and the only solution. Hint: take a crack at Hunters. I have a Hunter secret deck using Secretkeeper that is now godly thanks to UTH change (which btw, is funny, because it gives 40 dust too if you wanna DE it, even tho it got an upgrade, oops Blizzard!). There are some really sick combos with Buzzard, Leeroy, UTH and Snake Trap. So much fun.
I've also made some good friends in Casual. Usually they friend me afterward and compliment me on the unique deck style or whatever and then we test decks and have fun. In Ranked it's just far too serious.
And yeah holy fuck I said it ages ago, but they really need to allow you to "Save" 1-3 Arena decks per week/month and use them to play casual or play a friend. They could even have a third mode, where you play with a saved arena deck and you only get to use that deck for the week or something. I think that would be the most fun option BY FAR and it would increase the longevity of the game and the bang for buck you get out of Arena. Players would be motivated to just drop $2.00 to draft so they can have a fun arena deck to play with in the third mode or in a casual setting. I'd KILL for that mode. It'd be my "DM of DOTA" for HS. Players would have competitions about how far they could go with their best saved arena deck, etc.