And here we have the curious case of the Medieval Armchair Weaponmaster, who seems to have a deep and refined understanding of weaponry and the history of warfare.
Instead of internet lads, take for example George Silver (google him), an actual Medieval weapons instructor with some degree of clout, who literally ranks weapons according to overall usefulness. (
http://myarmoury.com/talk/viewtopic.11319.html)
As you can see, in actual battle scenarios, the 2h sword and 2h axe are included in the list of legit weapons. He also states that 1h weapon + buckler (sword and board) gets dominated by the heavier 2h axe and 2h sword.
What's more, I think Musashi definitively proved that with enough skill, the use of two swords/sword and shortshort is an extremely potent 1v1 setup. Considering he fought every kind of weaponmaster and never lost a duel, nor felt that switching weapons would benefit him.
What needs to be understood,both in-game and IRL, is that swords in general have a high skill cap, and require more baseline skill, than say a spear or axe. I know some people out there don't like hearing that, but the truth is that swords can perform a variety of thrusts/blows and has a number of defensive options that certain other weapons cannot do. They're a balanced weapon, and best used when one can exploit all they have to offer to the fullest.