I like hopping over enemies, beheading them and spamming the ultimates with Rachel.
I also love the new jump shot with the bow and improved water running with Ryu. I always considered the tap A to keep water running and not being able to get out of water without something to grab onto lame in Black. The redesign of the airship lounge is also aesthetically pleasing. Only minor complaints I have are that most adventure items are removed, military area is opened up unceremoniously after reused boss battle, and ziggurat is reduced to a single room.
My favorite addition is all the wearable equipment you get by completing survival challenge areas in each chapter with different difficulties unlocking different items.