Just an idea. Don't know if its good or not. How about they move the attack to the left mouse button. Hold the button down to gird strength indicated on a bar somewhere. Release at certain intervals for different powered attacks or combos. I play an ARC so if this sounds more inclined to that class I'm just biased :P But since I'm on the topic if the camera could then move to a shoulder view as you draw back your bow and the cursor becomes a crosshair. Oh yahh!