I'm not sure if there ever was a change to these besides buffing their half-swording capabilities so correct me if i'm wrong.
I think it's secondary mode by pressing X' should be 1h not polearm, that can be reserved for the greatsword class. I mean honestly you don't actually ever switch to half-swording mode when in close quarter combat, it's short enough already! Anyways, they should custom make their stats like they did for the half-swording mode. Something like...
Heavy Bastard Sword - 1h mode
Speed - 90
Swing Damage - 31c
Thrust Damage - 21p
Longsword - 1h mode
Speed - 89
Swing Damage - 32c
Thrust Damage - 21p
Bastard Sword - 1h mode
Speed - 91
Swing Damage - 30c
Thrust Damage - 20p