Haki Realm

Fixed: Blackbeard's darkness never going away. Black Hole, Dark Matter and Black Road left darkness that only a player's Liberation takes back, and he's not a player, so it stayed and anyone who walked into it got stuck. Now the ground comes back about 3 seconds later, even if he died, despawned or the server restarted mid-fight. Ops can clean up old patches with /haki darkness [radius].

Fixed: hitting a boss during its intro cutscene kicked you from the server. Attacking and using items is blocked while a cutscene plays.

Summons can't carry boss fights anymore. Anything a player summoned or tamed (Kirin's Nightmare Rift creatures, wolves, clones...) hits bosses for a tenth, and a boss that turns on a summon goes after its owner instead. Bosses also can't be put to sleep by Kirin's Slumbertize anymore, since each hit made the sleep longer.

Bosses take no fall damage.

No Sea King meat in boss fights. If a boss is fighting you, eating Sea King meat (raw or cooked) gets stopped. Every other food still works.

Zoan mastery can't be farmed by switching forms on and off. Taking or dropping a form gives no mastery now, fighting in it does (each hit you land gives half a use, at most once a second). Any move also counts only once every 3 seconds, and switching a move off gives nothing.

Logia intangibility now needs full fruit mastery. Until then you get hit like anyone else, but your own element still can't hurt you (a new Mera user still doesn't burn). Server owners can turn this off with logiaBodyAtFullMastery.

The Admirals are a lot tougher. Aokiji, Kizaru and Akainu have around 55% more health (1400, 1300, 1500), hit 30% harder, take less from big hits, dodge more and bring out their big moves about 30% more often.