On the two-weapon topic, byblos mentioned arena combat. Perhaps two-weapon fighting isn't so unplausable in one-on-one combat. In a war, there's far to much going on to fight like that. You need defence and form to control the flow of large number of foes. In one-on-one, there is only one target to considder. Given that most RPGs involve smaller combats, involving small numbers of foes, two-weapon fighting might be possible.