After all, there's nothing quite so justified, proportional, and relevant as insinuating that someone has body-odor issues when they ask someone something as rude as to do something you consider trivial.
Regardless of the nomenclature, it would be interesting to see the difference against Frag Missiles and Heavy Bolters against the basic troops of all armies.
With regard to Plasma Cannons I'm inclined to consider them the Loyalist equivalent of an Autocannon - slightly more effective against heavy troops and slightly less effective against light vehicles.