The 1 piece now gives both physical and spell resistance.

It’s definitely not overkill for pve tanks. Usually, pve tanks run support sets and have low resistances. This set ups the tanks resistances while providing damage mitigation to damage with 8 meters. It’s a staple for pve tanks.

This set strikes me as a mini-Fortified Brass or mini-Mark of the Pariah, only with a weaker, mechanic-based defense bonus. I'd say if you're prevented from taking Brass or Pariah, this is still a good set for tanking, provided you've got good mitigations going on.

You need to update the thing about the drops because they don't drop 100% of the time. I have done four veteran mode runs and it has been yet to drop