Blizzard has run the PTR servers and released the PTR patch notes for the latest Heroes of the Storm patch. The patch notes are full of changes. A few heroes have received the major overhaul to their talent trees. To be precise, Blizzard reworked talent trees of Arthas, Falstad, and Anub'arak. Finally, the victim of Blizzard's cinematics and the Try mode got some love from the developers. The patch is full of other, smaller changes. You can check them here. The PTR servers are expected to be up and running until the release day of Chromie, May 17th.