Is FPS controls not just clicking a button?
All I can remember playing UT2k3, is pressing the left and right mouse buttons to fire. The skill came in dodging, and making sure you dont have terrible aim.
That would work well for Archery, and your characters skill would then effect how well you could do that(i.e. reload, how far you shoot without going out of control, running and firing)
But for wielding a sword that way... its just simply clicking, and clicking... and clicking, strafing is good, but its mainly just clicking when it comes down to it.