- The change of Dark Soul to a Curse.
- The significant buff to Felguard health.
- The DoT effect on Chaos Bolt when used with Sacrifice.
- Cursed Auras no longer working with Mannoroth's Fury.
Not all of the changes in 5.1 were on the PTR, some were but were shrouded in 'undecided yet whether it'll go live' talk, others were there but never mentioned or responded to over questioning over whether they were just bugs. All of which though are still unmentioned in the 5.1 patch notes but still carry levels of game changing importance.
If we don't know these changes have taken place, how are we to know if those changes are intended? How are we supposed to keep up with the design churn if we can only find out about things from third party sites after the fact?