A few items:
The difference seems to be that you are worried about their form, while I am worried about how many times they can hit and be able to escape with their life. Sure, form is important, but we can all recognize that we are not going to instruct proper form to new people in 90 minutes or 2 hours...not going to happen. They need to act...and what happens if when they are repeatedly hitting the attacker escaping with their life they sprain their wrist, or hurt their hand? That's life!! That's combat!! That's battle! That's not self defense.
Concerning what weapons to cover..l.we do not change ever what weapons we cover...we do not provide the legal advice of what to carry and use and what not to...this is about survival and each individual can make that decision...but then again, I do not know any state where a pen, flashlight, stick are illegal..or lanyard for more advanced training, or a stapler, or a pencil, or, or, or, or...you see, it is not about teaching different weapons...it is about having the mindset that everything is a weapon...