It works =D.
It limits hakumen to only one of 2 safe approach options. (Well, now 3 with the charge 4C)
623A, Walking, and Charge 4C.
Dash lets 6D pick you up off the ground.
Jump forces you into blockstun, falling into pizza wheel chip damage.
Double jump, airdash, and super jump are shut down by 6D
It works amazingly well so why not use it and then adapt to how your opponent plays? =D