The Barbarian Hammer's specials are far too slow.
a) Increasing movement and startup speed during [L1 + Square] (spinning attack)
b) Make attack unparryable, like the Cerberus Blade's [L1 + Square]
Increasing area of effect and speed of purple flames from [L1 + Triangle] (purple flame attack)
Let purple flames linger like Cerberus Blade's [L1 + Triangle]