A G91 landshark that can be launched from 40yards away, and deal damage for any class is a combat utility advantage.
Also it doesn't matter if its "any PvP that matters", the fact of the matter is that it's an advantage within the game. Blizzard views this as a problem because it forces players into leveling into engineering to be competitive.
http://www.worldofwargraphs.com/stat...0-0-0-0-0.html
If you're seeking to become proficient in PvP, which profession are you going to choose? Blizzard wants it to be anyone you want.