Fonsj, there's a mechanical problem with your solution. Some people like myself can essentially vibrate their arms, which would be a stupidly large advantage. I have yet to meet someone who can come within 20 presses of me in the mario party games that use the "press A repeatedly" mechanic.
On top of that, anybody with a programmable button (both my mouse and Nostromo have 3+ could get a macro turbo function that would basically be one keypress to win.
Having a special parry animation (or a special effect, as Poklamez said) or allowing the person with lower damage to hit would be workable solutions, but I think the cancellation is fine as it is.
Fireproofjeans
Tylor joined
Student with programming experience. Will be working on many simple games until shipping off to uni for a Digital Media Bachelors degree. Also, poni. That is all.