The Heroes of the Storm Developers are pretty busy at the moment, alongside the new one PTR patch Today they also presented the plans for the revision of Sonya and Medivh before.
(Red?) Sonya
At Sonya, the focus is on more talent choices. The players should have more variants available, theirs Chances of survival to increase. In addition, the Heroes of the Storm team is adding a few more tricks to Sonya's arsenal. For example stand for Seismic crash new talents available to increase the area damage.
Furious blow is a new level 1 option that increases Seismic Smash damage and makes every fourth use of the ability free.
Broken floor Can be selected at level 4 and increases the range and area damage of Seismic Smash considerably.

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Heroes of the Storm - Medivh
The last guardian is the second candidate for change. Medivh is a relatively difficult to play champion who can and should be properly controlled, decisive for the game:
“When we decided to redesign Medivh, we were aware of his reputation as a difficult to play hero who is game-changing in the right hands. That's what we love about this hero, and we wanted to give players even more opportunities to show off their skills. At the same time, we want to remove some moments of frustration that opponents of Medivh can experience. To emphasize the exciting and challenging aspects of the hero, we've made a modified version of the Master's Touch a basic quest for Medivh and incorporated a version of the Reabsorption in Power of Will talent. On the other hand, Medivh can now use both Power of Will and his portal less often, so that his opponents experience fewer moments of frustration. We believe these changes, when combined with some exciting new talents, will allow opponents to effectively fight Medivh. At the same time, players are rewarded who use the Power of Will at the right moment and hit loads of enemies with Arcane Rift.

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The changes to both heroes can be found on the PTR at the moment and should be uploaded to the live server with the update next week.