Tamper protection not properly implemented. If you have to use that much force on the outlet to insert and remove the plugs, you'll end up misaligning the wiring in the outlet - these kinds of improvements in electrical safety are actually backwards in this regard and could lead to a whole new one lead wave. hidden wiring problems. After years of forcibly inserting and removing plugs, I worry that I will eventually lose the ground wire or one of the conductors, or that the wire nut will come loose. It makes me nervous.