Personally I have always felt that melee combat was generally underwealming compared to ranged combat in all but a few builds. But recently I noticed this Gem of a upgrade has real potencal to have characters with strength 4 hitting with around 12 strength.
I am not entirely certain of this but the stun upgrade seems to stack ontop of the damage upgrade. So that 2 (base damage) + 5 (stun) damage means that a character will have a base damage of 7+ with two perice for the cost of HP slot and 250 credits, thus far discounting any brawn the character may have.
Considering the average strength of a starting brawn focused character is around 3/4 and the additional option of a balienced hilt it seems fairly obivous to me that this is a very strong competator for someone who wants a melee weapon but doesn't want the social stigma of a lightsaber. Since being able to hit for 12 and set the weapon up to earn advantages means that the vibrosword can easily be paired up with another to offer a reasonably efficent pairing. I already have the idea for a unusual character concept to be paired up with the weapons for my fairly action heavy campiagn if my current mainstray goes south.
The question I wish to ask is am I reading this correctly or is there a catch that I haven't observed as of yet? I don't believe this is game breaking but I am just curious for my own clarification.