The last WoW Hotfix for March came with some class tuning for the tanking specializations and two general fixes regarding Soul Ashes and a quest.
WoW: Shadowlands is currently in Patch 9.0.5. It is still a long time until the next major content update but the development team is dropping smaller updates, known as Hotfixes, that take care of various game issues. Most of the changes relate to some of the World of Warcraft classes, notably the tank specializations.
Hotfix Class Changes