hmmm i see,intresting.The random advantage is a little overblown. It's about 50% if you are holding any button, say, trying to jump or poke back after you block it in crouch. But, you can cancel out of the extra animation if you are trying to attack, so it is really only a problem if you are trying to jump out. It's bad, but not that bad. The "input bug" is much worse than this.
thanks for the info somberness