Haha. This was an interesting topic. The relation of having a powerful punch and it being equal to your power level is obviously quite ridiculous. There are people who punch stupid hard who don't look all that imposing and then there are others who look frightening and can't punch for shit. How about all of these hardcore rappers who seem like badasses and then release a training footage of themselves hitting pads or something and look like absolute dog shit. That's hilarious.
Anyway, it would be nice to be able to make a rating system for ability, explosiveness and power and what not. It would be fun and technical. Totally possible with the right machinery.