Just to be a pain I would like to bring up the reality of History. this game is supposed to represent history right?
Well if you were to actually take a genuine Roman Legionnaire and pit him against a genuine French greatsword warrior you would find yourself standing in front of a dead Frenchman. Roman legionnaires were highly trained for up to 3 years before they were even allowed to enter a battle. The vast majority of Greatswords on the other hand were actually just poor farmer idiots who got drafted and handed a whopping big sword they could barely swing ( yes some were trained swordsmen but they were the generals who never actually entered battle so don't count). the legionnaire would have them skewered before they got the first swing in and even if they did manage a swing they would find their sword stuck in the Legionnaires shield which was designed to trap such weapons and make them unusable. the legionnaire now stands in front of an unarmed, unarmoured quivering mess of a man begging for his life which would be immediately cut short
Don't change the stats at this stage because it would just make things messy for the game but lets all acknowledge the superiority of the Legionnaire at least