It’s incredibly frustrating that what was intended as a temporary band-aid has become a fixture, especially considering how unfairly it neuters specs with healing-based defensives rather than immunities/damage reductions.
Feels like no one remembers when and why it was added in MoP. They didn’t yet have the tools to tune PvP and PvE separately, hence why it suddenly became such an issue at all (compounded by MoP onwards leaning hard into modifier-based gameplay with burst CDs rather than consistent damage).