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At release, the animations for Katana were identical to Broadsword. With Issue 2, the animations were completely redone, and much improved. Katana uses less endurance than Broadsword, but doesn't hit quite as hard. It is faster, though, so the damage per second is good. It's a well rounded and effective primary. Like the broadsword, every time you hit an opponent with your katana, it will reduce their defense, making it easier to hit them again.

[edit] Powers

Sting of the Wasp: basic bread and butter attack power.

Gambler's Cut: faster, weaker version of Sting of the Wasp.

Flashing Steel: A wide, shallow cone

Build Up: increases accuracy and damage long enough to make 3-4 attacks

Divine Avalanche: minor damage, 20% melee defense

Calling the Wolf: single target taunt

The Lotus Drops: melee range AoE. Not a heavy hitter, but effective in a crowd.

Flying Dragon: hits hard, often knocks opponent upward.

Golden Dragonfly: your strongest attack. Often knocks opponents down. Tiny cone effect.