While Shudderwock is by no means an overpowered card, it's overly-long animations are often a complete waste of time. As such, I am very glad to say that Hearthstone's latest update has now not only doubled the speed of Shudderwock's Battlecry animation, but doubled the speed of Lifedrinker's Battlecry animation as well! While this will prevent you from going for a sandwich every time someone plays Shudderwock, it will at least make the card a lot more fun to play against for those that might not be hungry at the moment.

On a similar note, Blizzard has now implemented a variety of changes to Arena in order to improve class balance. Unfortunately, they've done so in the classic Blizzard fashion, by which I mean they've given us absolutely no information or statistics to work with. The only thing I can tell you for certain is that Paladin's absurd winrate will be going down, though by how much and due to which changes I'm afraid I don't know.

If I were to hazard a guess, however, I would say that Spikeridged Steed and Call to Arms have been made considerably more rare. After all, they're some of the most impactful cards Paladin has, and yet for some reason they were appearing with worrying regularity in the majority of Paladin decks. Whether I'm correct or not, I suppose we'll see soon enough as the community and various stat-tracking websites will quickly get to the bottom of these changes.

While this isn't directly related to Arena, you might also be interested to hear that Hearthstone will be getting a major balance patch later this month, after the HTC playoffs. None of the current changes have been announced just yet, but it's expected that Spitefull Summoner, Quest Rogue, Call to Arms and some Warlock cards will be on the chopping block in order to help diversify the meta. 

Once actual details get released I'll make sure to cover them, but you can also keep an eye out for yourself by visiting the official website.