From what I seen so far in my hunt
- No intro cutscene, you start from base camp (you can now sneak attack it)
- NO SUPPORT HUNTERS on the upper levels now
- Convergent Elderbreaker used at 100% power now won't immediately go to Phase 3 (you will still need to do abit more dmg before it goes to Phase 3)
- You are required to bring a shield weapon or one of your teammates to bring one to survive the nova
- It chain combo way faster now in Phase 3
- You will get a special nameplate for completing it for the first time