Evening.

So, we are curbing vibroblades why exactly? The concept of a vibroblade is a blade with increased damage potential, therefore, someone creating a character wielding a vibroblade is basically saying "Hey, this guy has a sword that is way more badass than your average sword" - at which point we handwave the technicalities, because we understand, and agree upon the intended effect. In doing so, we also understand how it is INTENDED to function in a fight. 

We do plenty of hand waving around here. Have you seen my mecha? That shit is the very definition.