Why dont you make a real Centurion and put a towershield on him? make more sense with gladius (short weapon used with shield or is useless in battlefield) and history....
He needs more punch/sword combos, give him jab-slash-hook combo, when I heard about his style I was expecting him to have more put into his actual move set than a few low damage combos and a knock down-pounce gimmick.
Take away his charged jab knock down, make him pounce on OOS enemies only.