More and more I am thinking about multiple punch defense. Punches rarely come in one shot, yet often we practice against this scenario. It is definately a good starting point. After all, how can we deal with two strikes if we are unaware of how to protect ourselves against just one? That said, I worry sometimes many teachers focus on one-punch attacks--overlooking a possible situation to cope with outside the dojo. We should do exercises protecting ourselves from multiple strikes: some where we step back and get distance (a possible flinch situation); and other excercises where we try to get inside before the attack, or redirect the attack soon thereafter.
The other area I wonder about is jab defense. A jab is an uncommitted attack but potentially devastating. It is both underused, in my opinion, and under studied from a defensive point of view. Although an improper jab leaves a hole in the defense of the opponent (especially if not retracted fast enough), it can be difficult to read and still leaves bigger weapons available to your opponent, i.e. back arm and legs. To me, it is also a warning sign that the attacker is not ignorant to combat strategy in general. A jab, to be studied defensively, should be learned as a weapon as well.