A new patch is now live in Heroes of the Storm, updating Blizzard's MOBA with the promised changes intended to tame the game's stun-heavy gameplay a bit. There are balance changes to specific characters, and a change to the "Cleanse" talent at the heart of the changes. The description for this now reads: "Target ally now becomes Unstoppable for 1 second. 60 second cooldown." This post has the complete patch notes. Also, this post from Community Manager Spyrian says to expect more frequent balance updates going forward, typically on Wednesdays, though they are not promising them on a weekly basis:

We're going to start releasing balance updates more often, though not necessarily every week. Today's patch is the first of these balance updates, and you can typically expect to see them released on Wednesdays going forward.