Sure, why not. Also make it so heavier weapons and armor are hit radically more by the stamina effects and recover stamina slower and high wpf characters conserve more stamina because they're trained in fighting with their weapon and therefore know how to strike and consume less energy. I mean, accuracy for the win.
On a more serious note. I kinda like being able to defeat multiple opponents. With stamina, my character gets tired before I manage to kill all of them.
Spam happens because the enemy has a heavier weapon and stuns yours or because you have terrible timing/footwork. I do just fine with my morning star swinging black plate wearing spamming full strength character. I always have time to hit back and if I fail I don't really care because it takes 7 hits to kill me anyway.
This basically:
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loginTo explain: The guy who gets his ass kicked as terrible timing, and the other one has better footwork.