I have played all three parts of gothic and i realy must say that their combat system is one of the best i have seen because it allows very difrent tactics to be used(though its realy hard till you get used to it). Personaly i think something like this would destroy the need for Hit'N'Run duels because plaeyrs would have their own backstep block and attack combinations that are easier and better executed while stationary(for those who havent played Gothic the system required you to draw your sword press and hold shift and then press wasd depending on the combination you want "w" was for a purely offensive combo "s" was for a block "d" and "a" helped when you needed to fend something off while your friend chops it to bits).
I was wondering if there was a way to introduce something like this into PS because in my oppinion it would realy raise the challenge and thrill of duels to a whole new level.