Which bosses have increased resilience / have become stronger?

Question

I heard that some bosses, like Ferumbras, have been "upgraded" with increased resilience in order to give more people a chance to participate in the battle. Does it affect all Nemesis bosses or only few of them?

Answer 1

The new system only affects retro world bosses:
- Ferumbras
- Ghazbaran
- Orshabaal
- Morgaroth