Archangel's Ability Reduction Immunity Not Working [Under Investigation]
Archangel's passive to be immune to ability accuracy reduction effects is still not working. In fact it has actually gotten worse because he was tagged as "Metal" in a recent update which is now allowing both magneto's to lower his abilities in addition to the other heroes that were already doing this (Black Widow, Quake, Gambit, Civil Warrior, etc.)
If you need to test the bug it's very simple, go fight a Black Widow or Magneto(Red) and try parrying them, they will negate it periodically with their ability reduction passives.