ST destro damage can be easiliy fixed without touching our retarded mastery. All you need is focused chaos from pvp talents in place of CDF or SC. Even currently nerfed to the bottom of the oblivion version would improve ST damage drastically. You can expirience this by yourself just pick that talent and hit opposite faction during world boss encounter. But that will not happen. We stuck with current bad design balanced around wreak havok talent.
Affliction ST could also have a really simple fix. Even without remaking these idiotic on kill traits. But that will also not going to happen. We're not mages or rogues. So when Blizzard talk about class rework we should expect nerf. You'll see they either make some idiotic decision like soul effigy baseline or nerf us like last time when they say that they will rather buff us by doubling down on our strenghts and then nerfed survivability hard with damage nerfs to affliction (pvp wise mostly).
Leveling shadow priest currently. They will probably nerf them too because SP tops EVERY fight by at least 100k dps with the exception maybe of mythic dragons. 1 single sp spell called voidform is better than all warlock "cds" like infernal, dg, ulthalesh, soul harvest combined. But why don't like doom guard as damage cd? Oh it's because they said how they drastically improved it and it's still 800k-1.5m damage on 3min cd only if there's no target switching? No other class has such idiotic damage cd. It maybe fit demo with DE, but has no use for affliction or destruction.