https://wccftech.com/battle-for-azeroth-patch-8-1-dk-changes/

Blizzard has detailed the upcoming World of Warcraft Battle for Azeroth patch 8.1 PTR Death Knight PvP changes.

All Death Knight specs will undergo changes in PvP on the 8.1 PTR, and Blizzard has confirmed that more changes to the Unholy and Frost spec are on the way, including the reduction of the runic power cost for Death Strike and the increase of the Strike’s healing for Unholy and Frost.