I still say that the main reason that so many people have a big problem with Vulkans is that they do not play the game in the spirit that it was intended - lots of terrain, and environmental rules. If Vulkans do not have to worry about jamming their weapons and have clear lines of fire, then, of course, they are going to lay waste to whatever they encounter. I have played several armies that made use of terrain and have won against my Vulkans. I have played on boards (Level 3 or 4 Desert) where the amount of dice that the Vulkans roll forced me to jame so frequently as to make the Vulkans virtually ineffectual.
That said, I still think that are about 3 - 5 PC undercosted, but, I have not seen the rubric.
I still play Vulkans (though I do not play more than one squad per 750 PC), and I play Viktors, as well. I win roughly half the time I play, and I am happy with that, because I play for the fun of the competition. Set up boards like the game says you should - heavy terrain, and use environmental rules - seriously.